I've now got a "switch" mechanic working where if you take the power up you switch between swivel gun and forward facing. I think it will make an interesting mechanic because the forward facing is easier to control but I could place some enemies to the side or behind to force you to switch to be able to kill them.
I've also decided to go for a cute type theme as it is a mobile game and should be accessible to all. These are the characters I've drawn on inkscape. The yellow one will be the player and the others will be the enemies.
Let me know what you think and I'd love for some more ideas.
