It's clear that a lot of love and attention went into this game. As someone who works with GZDoom I can really appreciate certain things done in Sharpshooter 3D that people would normally take for granted. It was a fun ride from start to finish, totally recommended!
Very fun game, with pretty amazing level design. Really gives off big build engine game vibes despite being built off of GZDoom, and comes with a very wide variety of locations and weapons to boot. It won't take you more than a hour or so to beat, but It's a very fun hour.