Hey Onegoosewonder, thanks for playing.
You can only fuse monsters if they are at least level 2, and they must be male and female.
Hey onipuck, thank you for your review.
The game's objective is to obtain a tier 5 monster. I've recently released a patch that makes higher-tier monsters more likely to appear once they reach level 3+. Previously, this progression was too random. I've also changed the tick-live-time completely (to a score system).
Hey tetradigm, thanks for your feedback.