The biggest hurdle was alot of documentation existed for unity v4 and I was working on v5 although now there is more documentation out there and also the new coding structures for v5 makes a lot v4 code obsolete.
The controls are wasd and arrows for movement ,left click or ctrl key to shoot ,when die wait for wave to complete and press R to restart.
My Space shooter
The link below is a zipped archive just extract and play no install required.
Link to build of the game
