hythrain, thanks for your comments!
You're right the attack range is small and I have already fixed in the latest release. I also included a rewarding life every 2 or 3 enemies defeated, this simplify the initial difficult for new players.
Yes there's a invincibility time after getting hurt but after reading your feedback and seeing you playing my game I can see is very small and needs to be adjusted.
Regarding the customizable controls I will schedule this feature for futures release in the next months, this game has multiple options of input: the joystick, the touchscreen on mobile and the keyboard that you already use to test it... I need to search examples to make a good menu to give the possibility of customisation for all the platforms... But is an excellent idea, thanks.
Least but not last the losing of money when you die is intentional not a bug, the animation need to be more explicit I think... maybe I'm too punitive to make loosing the coins permanently. When I was developing this aspect I was worried that my game was too easy and I want to introduce the coins system to proceed... Now after your comments and also from other people I see the difficult trough the eyes of a new player and this help me very much!