I really enjoyed the concept! Racing snails and the plane mode had me grinning from ear to ear, and I liked how the big snail destroyed the environment as it rolled through! Kudos for a wonderfully whimsical idea and presentation. The game is quite difficult, and I feel that having some power up or item that temporarily boosted your speed would add a lot of depth. That way, you could afford to slow down slightly if you hit a blade of grass and not immediately die. It would also add depth in that you'd be actively trying to reach it instead of just avoiding obstacles, playing into the idea of risk/reward. That said, your first game jam game was much better than my first, and you should be very proud of how this came out :)