Viscous goop (purple slime drop) is kinda op. Use it as an enchant, and you get 3 hp per fight. Lets you get through the start of each run with full health.
Awesome game, 5/5 and favorited.
That said, the lifter beam coming from the capsules seems really buggy, sometimes it lifts and sometimes it doesn't, with no apparent reason. There should be a way to place blocks, so that you can climb back up instead of always using teleport pads.