Liberator by Rajcsányi László is a retro-shooter game made with GB Studio.
You main goal in the game is to use your ion cannon to destroy the gun emplacements and enemy ships. Flying through the enemy fuel tunnels on the surface of the ships will boost your fuel supply. Once you reach the reactor, you must blast through two regenerating force fields and a shielding wall to start the meltdown and intercept your way through.