Wow this was so much fun to play! I had issues with the first starting weapon where it wasn't registering collisions and as my guns up graded i noticed the collision detection was much more accurate. I now look back and see this as possible accuracy for the gun being poor. The variety of weapons was soo fun to see new ones, i got as far as having what looked like a rocket launcher!
The sandstorm was what eventually killed me, felt a little cheap but defo added to the difficulty so i dont feel too bad. I enjoyed that some of the harder enemies shot back. Very nice game!