Finally got around to trying this out.
Not bad, though I don't understand why my gold/currency would drop. Makes it take longer to get to unlocks. I liked that the enemies you'd fight would alternate between enemy mobs or a boss target that needs to be taken down. Being able to bring in an A.I ally was also cool. They weren't always that helpful but they did occasionally get me out of a bind. Also adds some gameplay depth as the player can choose to bring fights closer to their A.I companion so it can respond to enemies easier.
I found with bosses it was suicide to try fighting them directly, so I spammed projectiles (upgrade unit and the character's energy attacks) which sufficed as long as I was pretty careful.
Pixel Game Maker MV Game Development Challenge 2020 » Entries » DAIKAIJU DAIKESSEN [PROTOTYPE PROJECT]