Hey I think this is pretty cool. Its obviously still early in development, so there isn't a ton to talk about yet, but I like the sprites I think they look good.
some things I think that might be able to be implemented early that would add a lot would be a lock on function so you can strafe a target and use ranged more effectively. Click might be a good input for that. your screenshots show other areas and stuff but after I killed the first guy I wasn't sure if there was anything else.
I look forward to seeing where this goes! keep it up!