Love the concept. The controls are a bit rough though.
Viewing post in FrogChamp jam comments
I think it is a combination of
1) not consuming but sticking to a fly if you hit it (that feels a bit strange)
2) relatively slow to pull yourself up
3) jumping takes quite some time
4) not being able to move around
I don't say you should fix/add all those things but if they're more tuned/balanced it might feel a bit better