I feel like the game was too stale, you could win the game very easily, all I did was upgrade power twice and focus resources into the cooldown. There is lots of area to improve in my opinion (but that isn't a bad thing). I would have liked to see some new enemy types that did different things E.G speedier ones that would be prioritised, bulkier ones that took more shots, maybe one that is ranged that keeps at a distance and shoots projectiles you could shoot to destroy, just some thoughts.