Simplistic Tower Defense incremental with 5 towers that mostly just differ in stats. There are no additional mechanics in systems or enemies other than buying upgrades in attackspeed and damage. The on paper additional mechanics on towers are either irrelevant (shotgun range nerf, laser slow buff, cannon aoe damage) or detrimental (shotgun pushback buff). The cost and stat scaling of every tower is so random that you need hours after buying a higher tier one until that one is actually viable, until which point you are weakening yourself compared to before, and after which the previous towers are entirely obsolete.