A lot of fun! I liked how I had to take into account the upsides and drawbacks to different strategies; For example, an attack-focused build works great, but if you replace too many tiles with attack tiles too early, you wont have any money tiles to get money  to buy upgrades later! Before that, I tried a couple of runs with ARM/defense-focused builds, but because I didn't have enough of the marbles that deal damage equal to ARM gained, the enemy shield-wielder gradually gained more defense than I did as their numbers went up the longer the fight continued, and eventually the increased damage from the other enemies overwhelmed me.