Great game. I think devices and units are well balanced. The units downside is made up for with very way higher scaling.
It could be because it is a playtest but the game is very easy so far. A riot bot could go infinite 0 with no defence on his row.
Units that stood out to me:
- Brawler - With his 2+HP per kill is very strong, if he has a constant frenzy source he is immortal.
- Cannon Leader & Flint Sparker- Are too strong, especially the Flint Sparker.
My suggestions:
- Card Rarity system would make card pickups more exciting.
- Field effects (e.g. wind, broken floors, fire)
- Patch branching