Plenty of juice in this one - swinging the sword felt super satisfying! I also really enjoyed the art style and the design of the main character.
My top 3 points for critical feedback are:
1. I found the character controller difficult - attacking in a forward direction whilst controlling the character was difficult to manage all at once, so luckily the enemies are rather forgiving. My personal preference would be an attack from any direction design - maybe using the mouse and left click as the attack direction?
2. I almost immediately lost track of every coloured blob as soon as the round started - I would pretty much get one set of blobs, and then just try and brute force the rest - especially difficult when lots of blobs are on screen and moving between each other. It seemed impossible to track the pairs once they started moving around.
3. A small thing, but in round 3 (I think) when you introduce the powerup, the text says 'An imposter is among them!' (or something along those lines. I thought that the powerup WAS the imposter, so left it until the end of the round, expecting it to attack me or something. :D I would seperate the introduction of imposter characters (were there actually even any? I didn't realise if so!) and powerups to different levels to gradually introduce the player to new mechanics.
Overall, great job! Definitely something to be proud of :)