The visuals for this game were clean and polished. It felt pretty retro. The music added to the frantic energy without being overwhelming. It was intuitive and being able to mix and match the upgrades to meet that time constraint were fun to solve. The levels themselves weren't the only puzzle. I wish there was more of a build up in difficulty for the levels so you had more time to accumulate coins. The timer goes by way too fast.
All in all it was a fun puzzle :)