I only play the Jam release for now so maybe some critics are solved.
I like your graphics. It's sad there is no audio (with youtube free download artists and newgrounds, you can download legally some music and sounds effects for free). I'm not sure there is a victory confition (or I did'nt find it). Death is soooooo brutal : closing application seems to me like a bug.
No feedback with the player lose health ? A similar bat feedback will be great.
It's hard to design a roguelike but you have the mecanisms and with more time, I suppose you can fix all this stuff and do an enjoyable game !