Huuuuge fucking potential. While the gameplay itself is pretty boring, its addicting as hell.
With some tweaks this can easily be published on steam.
for example, let the user buy new "plots" to put monsters in, or let him place some kind of towers which buff monsters of a certain type etcetc. Let the player have more control over the game than "merge monsters of the same kind and buy new ones in the shop".
Not sure if i can be proud of it, but i got the yellow triforce dude on every single plot. It took me only like 30minutes of my life im never gonna get back.