Thanks for playing and for the feedback! Yeah I didn't have a ton of time to balance the gameplay, my strategy is to take out the enemies in the first row and get spell strength/speed upgraded as much as possible before moving further into the grid to get the chest. I usually try to corner enemies in the second row to avoid triggering a ton at once. The player gets pretty OP quickly with strength and speed upgrades, though it still requires enjoying twitchy-reflex gameplay.
I also wanted to make reflected projectiles either one-shot or reduce the enemy's health by half to make it more worth it but ran out of time. I think the way it is probably leads people astray because the shield upgrade sounds the most interesting, but provides the smallest benefit out of the upgrades as is