I think the game would gain a lot from making the numbers flash and scale as they get updated to draw the player's attention. Right now the game screen is very static. Adding a flash and some squash to the character getting damaged would make it visually clear which character gets damaged and would make the game look less static.
The friends / assisting characters stack and there's a UI bug where you see two of the buddy texts at the same time if the mouse hovers above both where their sprites overlap.
The art is very nice but you have different pixel scaling for the assets which make the game look like a mash-up of unrelated assets. Having a uniform pixel scale for all assets would've made the game look a lot more polished and cohesive.
Artist did a great job on the sprites.