haven't beaten the first mission yet, but after losing a couple times I decided to check out the second and found out bubblegum's teleport wipes the floor with everything. Everything that wasn't bubblegum was dying immediately, and after I realized this I started refreshing with all my coins with the sole goal of getting bubblegums. Also a couple times the game would decide I failed in response to Bubblegum killing everyone while staying alive, but it wasn't a major issue, bubblegum is too strong.