If you got bored playing Mario or Yoshi try this game where you use the both. Yoshi is something like transport and helper. Collect coins and try to find the key with princess. To switch between Mario and Yoshi press Tab. Mario climbs down and moves alone. You can find different buttons. The red needs to be pushed once, but the green needs to be presses all the time to make something happen. Nice graphics with known characters plus pleasant music.