Thank you!
The jump height was one of major critiques from Demo Day. I've increased it in my current unpublic build. I'm still trying figure out a good balance for the gun play. ATM they're pretty useless. I want them to be a fun tool for range.
I'll be adding keyboard support and looking into getting PS controller support. GMS1.4 has a weird bug with PS controllers that I'm sure a plugin/extension exists somewhere.
The flickering is intentional, but it does go in & out lot. Gonna change it so it does it at the beginning of the level.
I'm glad you gave the game a try. Thanks for the feedback.