Nice game! I played it a couple of times until I realise that I can crouch when going through the crabs :D
I was able to find a small bug where after you crouch the walking animation of the slime gets stuck in one of the frames. Very minimal but maybe it might help.
I liked the idea of the mobs speeding up throughout the game. I do suggest to speed up the game a little bit in the beginning since it takes some time for the game to become challenging.
Overall, congratulation on your release! I am glad that my sprites were helpful to you!!