I couldn't get past level 6 (the boss?), but it was a fun game with a great artstyle.
I think the save point mechanic of going back on level each time you die is interesting; I don't think I've seen that before, but it was a good fair balance of difficult and fair. If you kept going back, you'd just learn the mechanics better, so while it felt a bit punishing at first, I quickly got past each level back to the boss fight, which I couldn't pass.
The level challenges also progressed quickly, so I didn't feel like I was in a tutorial the whole time.
Well done!