I had no sound, so as far as that went I gave you the benefit of the doubt.
But for the most part it was easy to see that a lot of care and consideration went into the game, and for as far as I could play I didn't encounter any bugs.
If I had to choose something to gripe about, it would be how slowly the game progresses; maybe throw in a little more diversity in gameplay sooner.
For the most part, I wouldn't know if there was much more the game had to offer, seeing as I only got to the third wave and never discovered any new enemies. It was a bit on the difficult side, which seemed your intention, but with 26 levels it couldn't hurt to tone it down a bit; maybe make the gun do more damage.
I did like how incredibly polished it was, complete with the disclaimer. Overall an excellent standard for today's submissions.
Stephen R George