I like the artwork and how you gain gems from clicking on the 'upgrades' attached to the GBASP.
The fact that it was quick and easy to finish, which is a bit surprising for an idle/clicker game, made me wonder why there's a save feature? It's still nice for the sake of seeing the whole game.
Also, I prefer putting Digimon stickers on my Gameboy consoles, but maybe that's just my preference.