About NEON FRONTIER

Command laser, cannon, ice and plasma towers to stop robot alien armies and a giant plasma boss on a glowing alien planet.

On a computer: Click a pad to build, click a tower to upgrade or sell, keys 1-4, Space pauses
On a phone: Tap a pad, pick a tower, tap a tower to upgrade or sell, tap pause

Cesur described this game in a sentence on OhMyGames and the AI built it. You can make your own the same way, free to start.