The game is pretty good.
But I had no sense of direction where to go.
Nice touch that you can go directly to the boss battle after loosing the first time. The boss battle is well made I liked the sprite and the sounds the skull was making.

There should be a way to regain power and/or time. Some powerups or something. Otherwise it is a bit too hard. A minimap would also be a great addition.

All in all good job!

OK, game was fun. Not original but fun. The graphics are OK, though the skull looks nicer than the rest. Maybe the power and time decay are too low, I didn't have any challenge at all while playing, I just randomly hit any enemy at range to keep power and time high. You could for example spice things a bit by making every sword blow cost power.

Overall, need improvement but fun.

It's a good game that looks like it was made in a hurry (even for a gamejam hehe).
I agree that a map could help and the large empty areas should be blocked.
I wasn't really sure if I could touch enemies or if they hit me, some hit effect might help with that.
The boss is really, really cool, just got a little confused at the beginning of the boss battle since I couldn't reach him and there was nothing visible blocking my way.