I'm surprised that I was the only one to find this glitch but on the windows version if you have for example 3 slimes but you need 4 to complete the level you just have to be near the pipe and spam X times the direction towards the absorb pipe and it will absorb the slimes X times. Making it possible to complete the level with 3 slimes and even 1 slime. Aside from that nice game but I could not stop myself to cheese some part with that glitch. It was surprisingly still challenging with the red slimes haha.