1) Survive as long as you can
2) Predict targets path and TAP screen ahead of them to launch intercepting rocket
3) Control your budget (+20 for hiting enemy rocket, -5 for launching your rockets)
4) Up7up 7 Downgrade your base after each wave to increase Reload, Speed and Blast time
5) It gets harder with each wave so upgrade wisely!
HOW LONG CAN YOU SURVIVE ?!