Toodee and Topdee

Game jams produce a lot of clever prototypes and very few finished games. Toodee and Topdee is one of the rare survivors. Born at Ludum Dare 41 — the jam whose theme was literally “combine two incompatible genres” — it was expanded by solo developer dietzribi in GameMaker into a full commercial release: Steam in 2021, Nintendo Switch in 2022, at $19.99.

The premise reads like a pitch-meeting joke that somehow works. A cosmic accident merges two game dimensions: the side-scrolling 2D platformer world of Toodee and the top-down puzzle world of Topdee. You control both characters, swapping between them on the fly — and each swap doesn’t just change your avatar, it reinterprets the entire level’s physics. Toodee sees gravity, jumps, and bottomless pits. Topdee sees a floor plan she can stroll across, pushing blocks like she wandered out of a classic Sokoban. The pit that kills one character is walkable ground for the other. That’s the whole game, and it’s enough.

Market positioning is worth a beat here. The perspective-swap puzzler is a small but distinguished lineage — Fez rotated 2D into 3D, Crush flattened 3D into 2D — but nobody had built a game on toggling between platformer physics and top-down logic as the core verb. The result found an audience on word of mouth rather than marketing budget. For a one-person GameMaker project, that’s not luck. That’s design.

• Dimension Swapping: The core mechanic. One button flips the level between a gravity-bound 2D platformer (Toodee) and a free-roaming top-down puzzler (Topdee), and every object in the level obeys different rules depending on who’s active.
• Local Co-op: Two players each take one character and coordinate swaps in real time. The game transforms from a solo brain-teaser into a communication exercise — the good kind, mostly.
• Granular Difficulty Settings: Not a binary “easy mode” but individual rule toggles — add coyote time, slow the game speed — that let players sand down the precision-platforming demands without gutting the puzzles.
• Multiple Worlds and Boss Fights: The swap mechanic gets stress-tested across themed worlds and bosses that force thinking in both dimensions under pressure.

The One Good Idea, Fully Excavated

The test of a mechanic-driven game is whether the developer keeps finding new consequences of the premise or just repaints the same puzzle. Toodee and Topdee lands firmly in the first camp. The opening levels teach the vocabulary: a gap Toodee can’t jump is floor Topdee can cross; a block Topdee pushes into position becomes a platform Toodee can stand on. Then the game starts conjugating. What happens to a block Topdee is pushing when you swap mid-push? What happens to Toodee’s momentum when the world stops having gravity? Each world introduces a new object or rule — and critically, every new element has to make sense in both dimensions, which doubles the design surface of every mechanic. That constraint could have strangled the game. Instead it disciplines it.

The gameplay loop alternates between two mental modes, and the friction between them is the point. Topdee sections are deliberate — plan, push, position. Toodee sections are execution — jump, time, commit. The best puzzles interleave them so tightly that planning a top-down block arrangement happens while mid-air in the platformer view, with swaps at the apex of a jump because the geometry only works for a half-second window. When it clicks, it produces the specific satisfaction that only good puzzle-platformers deliver: the feeling of not solving the level so much as outwitting it.

Where It Strains

The honest critique, echoed consistently across the Steam reviews: the late game leans harder on execution than on insight. Precision-platforming sections spike in difficulty, and a player who bought in for the puzzle logic can find themselves failing a level whose solution they figured out ten minutes ago. That’s a real design tension — puzzle players and platformer players are overlapping but distinct audiences, and the endgame picks a side.

What redeems this is the assist system, and it deserves specific praise. Rather than a face-saving “story mode” toggle, dietzribi exposes individual rules: turn on coyote time, slow the simulation. This is the right way to do accessibility in a mechanics-heavy game — let players adjust the variable that’s actually blocking them and leave everything else intact. It’s a more thoughtful implementation than plenty of AAA releases shipped that year.

Co-op

Local co-op restructures the game rather than just splitting it. Each player owns one character, which means each player owns one dimension — and a swap that saves your partner can strand you. It’s a genuine coordination puzzle layered on top of the level design, with the couch-yelling energy of Overcooked but a slower, more deliberate pulse. It’s also local-only, which limits its reach; no online option is the expected trade-off of a solo project, but it’s a trade-off nonetheless.

Interface and Onboarding

Onboarding is handled the way it should be: through level design, not tutorial text. New rules arrive in safe rooms that let players poke at them before the game asks them to combine them. The swap itself is designed to be instant and readable, communicated through a full visual mode-shift — the ruleset in play is always legible, which matters enormously in a game where the same tile means two different things.

The pixel art is charming without being memorable — bright, clean, expressive characters against readable level geometry. And readability is the correct priority: a game where one tile has two meanings cannot afford visual ambiguity, and this design never allows any. The two dimensions are visually distinct enough that a mid-jump swap shouldn’t disorient. The chiptune soundtrack is catchy, sitting comfortably in the jam-game-made-good tradition.

Technically, a 2D GameMaker game of this scope is light on hardware, and the design depends on swaps registering instantly — frame-tight timing hangs on them, so responsiveness is a structural requirement rather than a bonus.

Steam is the version for players chasing the hardest content. Keyboard is serviceable, but this is a controller game — analog movement matters for Topdee’s positioning and a shoulder button is the natural home for the swap. The Steam community layer (guides, reviews, discussions) is also a real asset when a late-game level has you stuck.

Switch is arguably the better cultural fit. The game’s world structure breaks into handheld-sized sessions, and detachable Joy-Cons make it the lowest-friction co-op setup imaginable — hand one over and you’re playing. The trade-off: the most demanding precision sections are a poor match for a single Joy-Con’s compressed d-pad-less layout, so duo players tackling the endgame will want a Pro Controller. At $19.99 on both storefronts, the choice comes down to where you play, not what you pay.

Toodee and Topdee is what happens when a jam concept gets the years of iteration it deserves instead of dying in a portfolio. The genre-collision premise could have been a novelty that exhausts itself in an hour; instead, dietzribi keeps finding new consequences of the idea for the game’s entire runtime, and wraps the whole thing in difficulty options that respect the player’s time and skill ceiling alike. The endgame’s execution demands will frustrate the pure puzzle crowd, and the presentation is workmanlike rather than striking. Neither flaw undoes the core achievement: a mechanically original puzzle-platformer, priced fairly at $19.99, that earns a recommendation for the right audience — puzzle-first players willing to meet its endgame on its own terms. Play it solo. Then make someone play it with you.