Misc:
- You could give random color palettes to enemies. This would be an easy way to create more variety and can for example be accomplished by using shaders without much effort (for color variations you could just make the sprites RGB and then exchange the initial values)
In terms of controls:
- It plays very good (fluently) for the early state it is in, which is very good.
- Depending on where you want to go, I would like to have the ability to duck, duck kick, dash, slide, air-attack, maybe climb. But as I said: It depends on where you want to go.
In terms of "content":
- I'd like to see a wolf enemy (a classic :D)
- What about dragons?
- Snakepeople (Lamia). I think I haven't seen many of those slithering around in other games.
- Anthro badgers.
I really like the artwork. Sheila looks great! And all in all (as far as I can tell, comparing it to other games) you've put some effort into the underlying programming what I really appreciate.