It wasn't clear to me what the 'E' key is for but then I realized it's needed for jumping on the second level. At first I thought there was a bug on the third level but then I discovered the 'E' key is needed there too. I got stuck on the tongue level. In any case this is a good start with potential. I like the way the blocks disappear as one moves forward.

The tongue level was very difficult, mostly because it wasn't clear how the click mechanic worked. Not sure if that's intentional, but just adding a few words would make that a lot clearer.

Other than that entertaining :)