I think I should point out that some of the puzzles are very strongly not colorblind-accessible, namely the “code” puzzle and the “balloon” puzzle, and in this case that feels rather arbitrary and unnecessary. You’re basically just not allowing dichromats to play the game (and possibly making the game more difficult than it should be for some anomalous trichromats, thô that’s hard to verify since anomalous trichromacy varies so widely).
There’s a number of ways to fix this, but one very easy way would be to include distinct patterns and/or shapes alongside the color information.