This is very cute! I love the concept, and it's very satisfying to blast away with the guns. I did find it very difficult. I got past the jump where it specifies you need to use the shotgun and the pistol together to progress, but I couldn't see the specific combo required for the next jump and gave up after a few goes.
Possibly this is in the sort of hyper difficult high precision genre, but personally I'd have liked more obstacles and level to play through to just get to grips with the mechanic and get comfortable with it. The very first wall I hit, I had to take half a dozen attempts to line myself up with the pistol to jump over it! (before realising I could shoot the pistol in mid-air)