In the later levels it's a bit easy to lose yourself in the crowd. The idea is really cool though. But I feel that it ties to the theme more thematically than mechanically, if that makes sense.

Really enjoying the concept. One of the more intriguing things is taking abilities at the determent of yourself to negatively affect the clones (slow speed). That could  end up making some really interesting scenarios for player decisions. Did you play around with the idea of limiting how many abilities can be equipped at once?

The level immediately following the gaining of the dash ability is near impossible. The AI seems to have no rhyme or reason to be doing anything, just dashing and jumping everywhere. I think cutting down the number of enemies and going into a very decision trees (patrolling, rushing vs ranged attacking, etc) could really make them feel like a threat rather than a chaotic force of nature.
Also had a bit of a bug when I used dash for the first time. Couldn't use any other abilities until I died and re-spawned.

Attacks have a swipe sound but no hit. Adding hit sounds and bit of screen shake could really add a lot to how the hit feels.

I can tell a lot of love went into the art. If you choose to continue working on the project I think there's a lot of cool stuff here.

I enjoyed playing this game! It gets challenging!
I like that I can equip different abilities the further I go into the game, that's great, but the text I feel was hard to read at the Unequipped and Equipped part.
And a lot of people are used to using the WASD keys to move the character, so I think, to make the controls more smooth, the attack buttons should be the mouse keys.
Other then that, congratulations for making this game within 48 hours! You did amazing! Good job!

Check out our game if you haven't I would really appreciate it!
https://itch.io/jam/gmtk-2019/rate/461569
(-Amy)

I enjoyed this game a lot! I enjoy the process of figuring out what I can do without and what helps the AI the most. It has some rough edge (the lack of a character attack animation was surprising since the rest of the character was so well animated), but I think you are onto to something. My biggest problem would be that I am not sure how this fits the theme "Only One". 

Mark played a game on his stream which has a similar concept to yours. But this game actually made better use of the idea. Mark recommended to check this game out: https://store.steampowered.com/app/551770/ECHO/ Well done!