Nicely looking game (as usual) and I guess it would be nice to play ... if the controls were nice.
- No gamepad support
- Why mouse? Mouse has no place in platformers
- Moving is done with left hand (which is normal), but jumping is also done with left hand (because the right hand is on the mouse) - this is very unusual
I haven't made it past the first level either (although I collected all except one keys), but I think the difficulty is probably ok - it's just the controls which make it unreasonably hard