The speed of the acid made the game quite difficult. Slowing it down a bit could maybe make it more predictable. In turn you could also randomize the fall speed. The jump also wasn't really necessary here.

 Unfortunately there weren't any sound effects.

Nice sprites though. And next time be sure to add a webgl version of your game together with the download. People are more likely to play something if they don't have to download it. Cheers!