The Last Spire

Made for GM48 39. On an island in a lava sea, you are under siege! Survive as long as you can through this unending bombardment on all sides! I ran out of time to balance at the end of the jam, so take it as an accomplishment if you manage to beat wave 6... (^^The important strat to do so is to focus down the big ship in the distance, its the second enemy that spawns)