LOL, this was a fun one.
The design is that of a maze game - walls, pickups, enemies, a goal
The strength of this game isn't in its gameplay design, but in the atmosphere and adherence to theme. Evolution is a perfect example of endings being a new beginning, and the mouse *does* evolve in some way - she's not strictly an action-RPG character where Number Goes From Down To Up; numbers of deprioritized things also go down
It's obvious that the assets aren't flipped and someone put love and time into everything on the screen. I found the atmosphere sort of Pikmin-ish - the fact that the predators just crash through the walls of the maze and are enormous really had me scared for my already-doomed mouse. The deranged principal investigator's notes also added to the general "is this cute or horrifying?" vibe.