Thanks for the feedback :)
I've noticed it seems to be broken in the WebGL build, I'm guessing it is because another UI element is on top, blocking the raycast, but I'll fix it for my next version :D
I initially wanted to add 5 levels but I realised how hard level design was. I'm going to try 5 levels for the next release and play through them multiple times .
I'm also hoping to add collectibles (liek the mario star coins) where there'll be 3-5 per level that are optional but may unlock other levels.