It kept me fairly engaged until I hit floor two, and I realized the rest of the game was going to play out extremely repetitively and closed it, having felt like I'd already played a significant chunk of what floor 2 was offering me.

I've tried re-opening the game a few times since, thinking I'll give it another chance, only to close it again for the same reason. The game might have more optimization puzzles for me to solve, but as of now they're out of sight and reach and I can't find it in me to go looking.