So after reviewing the feedback I got for the demo, Their are key problem areas I fixed with this recent update.
1st - I kept being asked how to equip the flamethrower.
So I added an additional icon to the hud that explains all the controls. Also, after purchasing the flamethrower the text in the shop explains how to equip it.
2nd - I don't want to click on the shop icon, while in the middle of the action.
So, I made "e" a hotkey, that will bring up the shop menu.
3rd - I felt the gameplay could be tweaked a bit.
So, I lowered the enemies life and increased their rate of fire, I lowered the players initial life and I also increased the boss's damage, to make him a little more challenging.
I hope you enjoy the changes.