This is definitley one of the best zombie survival games I have ever played. You use almost everything, it takes a reasonable time to do things, your fortress gets attacked instead of you always attacking the zombies, and there is 4 different ways to win. 5/5, for sure
Eh... at least you can program right? I feel like you tried to make a ramkae of space invaders, and got lazy, and ended taking a crap on it and telling us it's finshed. Wipe off that crap, and make it better.
Guys, (Downrate this as you like) the game they made was first an app for macs. I have in it my dashboard, so they are probably not going to edit it, and if they do make a sequel, it is because they want more consumers.
A couple improvments... (even if it's a demo) add a town to interact, where you can improve and upgrade your ship, sell supplies, buy supplies (Which would make merchanting a big part of it) have some varriety in enemies, and improve the background.