I don't see any reason for bone collector upgrades since all bones are collected at the end of every level, but that self-destruct feature... there may be something to that. I've got an awful lot of bones and brains walking around by the end of the level.
That was good. the only ones I had trouble with were those darn rooks. Even the queen went down fast. Though I killed her, died like an idiot, and then I was at the end but she had respawned. that was weird.
The arena 1hp thing isn't a bug. every day the hp of submitted decks decrease, and these decks have been here for years, so they have 1hp. It's a feature, to keep users active, but the game is years old. On the plus side, it's easy to get money now
Ok, some tips for the new people that either didn't come up in the tutorial or were just things that you discover:
Yellow lights stop the flashlight. if the ball or you touch yellow, it returns to you instantly.
if you're on a diagonal and jump, you fly off at a 45 degree angle. darn hexagons.
related, no matter what angle the light ball hits a corner at, it ALWAYS flys as if it hit straight on. it will always proceed at a 90 degree angle, heck physics.
Definitely getting points for a concept I haven't seen before. I aaaaaalmost panicked about the lack of tutorial, but the information I needed showed up like 3 inches later, so maybe i'm just getting impatient in my old age ':)
Also, tip: It's worthwhile to wait to use fire arrow until riiiiiight before the enemy attacks. if you use it at the beginning, the next attack starts right away. #wasteenemytime2019
Poison is so overpowered it's not even funny. Gotta agree with others, I'd make it last a certain amount of time, instead of quickly draining your health until you die.
I know this might be tough, but would it be possible to implement average damage per ball? you have damage total, which, while cool, isn't super helpful to newbies. damage per ball (for each type) would give a good idea of which balls work well and how effective an upgrade was. or maybe I just like having ALL THE NUMBERS!!
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I really don't like holding the hand of the player, I just put the new mechanic in a safe spot, so you can discover by yourself :D