This is good! Overall solid experience, but I have some issues to point. First, it lack variety in the enemies pattern, they just follow you and after a while it gets just too easy and stale... Add more enemies, with more movement pattern and weapons! It's a shame about the absence of sfx, adding gun sounds could really make the shooting more fun, especially when the gun feel is already quite good. And it would be nice to have more feedback when you get hit (visually and sfx wise). These are my little complaints, but beside that it's a great start for something that could be amazing!