Its decent. However you should make the enemys more intresrting and add a variety of them. They should also aggresively attack. I also think you should take out the timer its just annoying and takes the fun out of it. I think the guns should also be less expensive. Make the graphics a little more intresting to. I think with all that you should be good.
I understand it is incomplete so its hard to offer a review. Over all it seems to function properly. I suggest however that zoom the camera out some. Also make it more appearent you are under water. I asume you're going to add music and sound and in the begining you can walk backwards and fall off the game. I suggest putting a wall there. I look forward to the finished product.
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