This game was awesome. It's quite impressive how you pulled off well working dialogue boxes, an ending cutscene, and some pretty solid sword fighting. You made the game very intuitive and easy to understand, and I like how you can see the attack cooldown easily displayed. The checkpoint system is also nice although it seemed to not reset the enemy health bars / respawn them. And also I liked the boss fight at the end and how enemies in general display their next attacks.
If I were to offer any suggestion it would be to give the player more control over the distance they travel when attacking. Holding down vs tapping the attack didn't seem to be very different, and I think it would be nicer if tapping sent you forward only slightly because otherwise when you fight multiple crabs you can easily fly through one and straight into the other's hitbox. Either way I quite enjoyed this game.