This has a lot of potential, the mechanic is really creative and unique and the art is cute, but most of the time the other character can be ignored for the most part or killed instantly, other than that the games really good

"I play the vilain and the hero". J Cole - Rags to riches. X)

That's what I thought about when I first played your game and I think that's an interesting take on the topic! Instead of teaming up with someone the other player to solve puzzle, why not make HIM the element you should actually avoid in the first place ?

Nice work man! :)

I like the main mechanic, I've seen a few games that have player input controlling multiple characters, but I this is the first one I've seen so far where the other controller character is the antagonist. One problem I have is that it's a little too easy to lose the enemy character. Especially in the early levels, it's real easy to just get him to walk off the ledge, and you can then walk to the end of the level with little trouble. Maybe multiple doppelgangers that spawn at different start locations would help with the difficulty? I think there's a lot you could do with this mechanic, and it's a shame about the time limitations of a game jam, as I would like to see more.

I also really liked the design of the player character and especially the bad guy, and the effect where he is first reduced is awesome.

Fun and simple take on the theme. Good  controls and easy to understand. My only complaint is the sound effects are way way too loud. Good job overall.