I don't know if it was like this for you guys but when i played:
At the beginning so many cool guns not enough money
Around level 20 Too much money really bad guns
Tips: Boost Jumping
Space makes you jump right
Up/W makes you do a fast tumblr roll forawrd
What happens when you press done both at the same time?
I call it boost jumping simply makes you travel faster and flee from enemies easier.