Cool game!
The presentation is great, especially with all the moody lighting and dazzling visual effects. Also, I loved the encounter design! Through the combination of enemies with different attack and movement patterns each room presents a small tactical puzzle, that is interesting to solve.
I would suggest making upgrades more frequent and meaningful, though. The upgrades pricing is somewhat off too. I often found myself short of scraps, despite diligently cleaning up every room on the floor.