Hey, thanks for covering our game in your stream! It really helps to see where our flaws are. The understanding of the mechanics are tricky since we didn't have time to include any sort of tutorial and rushed the submission just before the deadline so we couldn't write better instructions. Sorry for that!
The idea is to die on the spikes to create a ghost that can be red, green or blue. Then you have to guide them to the switches of their respective colors. If two ghosts collide, they merge into a new with a color that is a mix of the previous one, so for pressing the yellow switch you need to merge a red and a green ghost. Getting caught by a ghost will restart the level. Also I noticed in your stream (timestamp 1:00:00) that you never got to jump (again our fault for lack of instructions), you can do it by pressing the spacebar.
Thanks for giving it a try!