I think there should be a sandbox mode where you have infinite mana (unlocked after you beat the game). Would definitely lower the number of cheat engine users.
Would be nice if I didn't go bankrupt 3 times in a row because I didn't have the stuff people were asking for. I had a blacksmith and a sorceress and they were constantly asking for tailor or carpenter stuff. If you could change that then at least I'd be happier with this game... I might even pay a little.
To use the bow you click on the arrows to pick them up. Afterwards you press SHIFT to pull out the bow then click & hold to draw the string back. Aim with the mouse.