Void Source Origins

"Void Source Origins is a top-down shooter game set in space

You control a spacecraft that can shoot 4 different weapons (collectable as bonuses), travel at very high speeds and orbit planets.

Move with directional buttons or left stick. Aim with touch pad.
Press touch pad or Cross button to shoot, Circle button to do a super attack, Square button to charge/heal.
Press L1 and R1 to switch between linear and orbital movement mode.

Your goal is to destroy enemies that spawn randomly somewhere in the vast space of the solar system that you are guarding.
They can warp through the edges of the system. You can't."