Arrow keys to move. Red kills. You can swim in water. Get to the yellow to progress. There are only 4 levels. Make your own platform games with this engine! Remix or backpack the Player sprite to get started. You can change colour sensing to touching sprites, as it'll speed the game up and make collision better.
EDIT: This is the OLD engine. I recommend using (Finally Perfect) Platformer Engine (https://scratch.mit.edu/projects/238636950/) instead, as this one is a bit buggy and slow. A (nearly perfect) platformer engine! Features wall jumping, swimming, and slope detection! Code similar to the code in the @griffpatch_tutor tutorial, but I coded the engine myself. It's all by me. This is the first (good) project I've made! I hope you like it, and I promise to make projects just as good in the future! Please give credit if you use this base to make a platformer! I can't wait to see what you make with it.
