Darn it I forgot that would happen. Unfortunately it's an issue with the HTML version since I can't grab the mouse within an Input so I just setup the start button to lock the mouse, but forgot to add it to the restart buttons :/.
I'm happy you enjoyed the idea though! I'll definitely go back and fix that post-jam, the HTML is always a little screwy.
Edit: Also I sorta had it fitting the theme because you can mix colors together to get different effects, hence "joining them" it's a bit of stretch depending how you look at it tho.