It starts out slow, but after some upgrades, the ball gets rolling. I do like the simplicity of the enemy layout. It helped with the chains.
That Mint shop art is sooooo cute! And picking and choosing which item to go with made it fun as I kept playing more to get more upgrades.
Some of the descriptions for the upgrades does use some high level vocabulary. Things like "orthogonal" might not make sense to people who don't remember their high school math XD.