Nice submission!
Here are some things I particularly liked:
- Good choice and use of (assets art, SFX and music)
- Cool combo system
- A really nice and well written game page
- Levelling system
- A mix of challenges (standard enemy, boss and hazards/traps)
- Having a decent tutorial
Here are a couple of things I think could be improved:
- Being able to fully skip the tutorial on replays (maybe a checkpoint after the tutorial could do that)
- Making it clearer that you can and should level up before facing the boss
Overall, great job :)