Also, if everyone else is eliminated except for you, you can only take one more turn before the game ends, and even if you have plenty of territory to turn into castles (all undisputed what with there being no other players) you can still lose because you don't have the most castles when the game arbitrarily ended.
This is the most utterly bizarre concept I have ever seen for an escape-the-room game. You get LOCKED into the kitchen by accident, so you have to prepare random snacks to find the hidden numbers to get the code to the safe. I just... wow.
The powerups easily blend into the chaos of bullets and enemies, draw absolutely no attention to themselves (like being a different color), and disappear just as you happen to notice them. I don't think it's the rarity that's the problem, I think it's how inconspicuous they are.
Also, I made a match of 3 which sent me past the bottom line, but rather than registering and allowing me to continue, it gave me a game over. So you should make sure that it checks for a match before allowing a game over to occur.
I would just suggest that you cut down on the glowiness a tad. It makes it absurdly difficult to match by color when I can only see what color any given runes are half the time.
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 "Quarters"){kind=icon}
 "Escape from Kitchen"){kind=icon}
 "Superior Ball"){kind=icon}
 "Darkest Days"){kind=icon}
 "Illusion Escape"){kind=icon}
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 "Christmas Cookies"){kind=icon}
 "Big's Quest For Growth"){kind=icon}
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 "Breakit 4"){kind=icon}