Red and Green Rainbow

A hidden door gives Red and Green Rainbow a specific puzzle to solve. Take the key and the door becomes visible, while only the green character can remove the laser. Those two rules make the characters' positions matter rather than treating the adventure as a pair of independent runs.

Red and Green Rainbow lists WASD and the arrow keys, double jumping and mobile touch input. It does not supply a separate laser-removal button, so check the in-game prompt for how green performs that action instead of inventing a new key.

Slime, bats and jump ramps are named in the description, which explicitly invites a friend. Double jumping appears in the controls as well. The source does not give a level total or explain every enemy's behaviour, so the confirmed key and laser rules are better guides than assumptions about a complete hazard system.

Plan the key route and green's approach to the laser together. A ramp may help with movement, but knowing which character must handle the barrier is the clearer priority, especially before both players commit to a jump toward a door that is still hidden. The red-and-green partnership has another puzzle outing in Red and Green 4.