At the beginning the game may be too “easy” (just one ball) so I added the ability to add another fireball (limited only by mana). So you get more chances to hit the wizards, but you have to handle more bouncing balls. The barrier is not a perfect line. It could be easy to do it, just detecting mouse-in and mouse-out. But again, the irregular shape makes it more interesting, un-precise and “realistic” imho. You can draw better lines wasting more mana too. I couldn’t (I didn’t want to) add movement, that was the whole point of the jam; unless… I added mana penalty or other drawback for moving. But then it would become closer to just another dungeon crawling game. And the idea was to clear dungeons without moving. Thank you for the thoughts!