I like the concept, but i found it hard to have both players simultaneously where i wanted, cause at some point i had one managing to make a jump but the other falling down, the base idea is good and the controls feel responsive, but i feel this could be improved by having the level design help with maybe locking one player in some place so you can position the other in the right spot to then have them synched to be able to reach the end at the same time, other small issue is having black text on a dark colored background made it a bit hard to read.
Other than these, its good and has a strong core idea, for a first jam it's quite allright actually :) i like the pixel art and it's a nice touch to have the light areas around the characters, just too bad that the game has no sound or music of any kind :(
Just needs a bit of tweaking but its a good start, so well done to you mate !