I may have played this wayyyyyy longer than I intended to... You have a very addicting game loop here! I love the premise and enjoyed your characters. I felt a little guilty saving up chips on some triangles and always forcing Geriatric Gary to ally while I betrayed him repeatedly. Just couldn't trust that guy!
The shopkeeper was a great touch too! I clicked and clicked and clicked! Is the unlocking true?? I wasn't sure after the use your imagination line.
For the most part, I enjoyed the music. The game over music was a little over the top for me though. You have my respect though for making the music yourself! A great start! The SFX were great too! Especially the character sounds. It brought a lot of life to them.
My only recommendation would be to make the change to the triangle's stats more obvious at the end of the round.
Thanks for an evening of fun!