WOW! I really appreciate the in depth review, this was awesome, and extremely helpful and insightfu! Here's some fixes i'm making for future updates and the finished game based on your input.
-I've changed the slingshot method to holding the input.
-controller support in the settings menu is really hard, but added controller diagram
-baseball bat will not slow you down.
-Will work on stretched monitor
-will give rocket boss more attacks including charge :)
-adding Grenade / Molotov counter