This game definitely has some potential.
However, I find it rather difficult (final boss, at least). I didn't finish it. Because of the lack of checkpoints, I don't really have the motivation to try it again (I've reached the final boss twice, but failed both times). The problem is, that I have to play through easy levels, to get the boss, which is not ideal. Also, disability to heal encourages passive gameplay (basically, I only attacked with L, and avoided all close combat)
On the plus side - the game looks very good. Conceptually gameplay is rather interesting, but (imo) it didn't manage to fully unlock its potential, because of the issues mentioned above.
So, it is definitely good for a prototype, but it could be much better with few changes. Which is a shame.