this game needs some chekpoints we can start from, either way it has no reason for playing more than 10 minutes. may be some constant upgrades (like +10% HP after each wave), some buyable upgrades. those red dots must heal more, than 1% of hp. may be some way to switch between targets or make some priority, like shoot meteors first.
LOTS OF WORK must have be done!!!
I will upgrade with autofire tomorrow. Thank the feedback. o/