The Treasure Volcano v3.0

Programming and most of the art is mine, the awesome volcano was made by @Locomule, and the music is Space Cow by @AgentRoop! I hope you enjoy playing! Also, there is a secret somewhere in this game. Finding it should help out a lot!

20,000+ views, 1,000+ Loves, 1,000+ Favorites. Thank you guys!

UPDATES:
v3.0: Added the ridiculously awesome volcano that @Locomule made. Thanks! Also, changed the ground and sun sprites.
v2.6: Changed some variables. High score has been reset. Claim it! Also, fixed some layering issues regarding the upgrade descriptions.
v2.5: Changed some things to improve resolution.
v2.4: Rainbow gem is very, very rare, but now gives $1,000!
v2.3: Changed volcano sprite and made the scripting more efficient. Also, the rainbow gem is EVEN MORE rare! (1 in 500 chance!)
v2.2: Make rainbow gem even more rare.
v2.1: Fixed bug that has to do with the secret...
v2.0: Press 1 to change your character's shirt color!
v1.9: Erupting sound!
v1.8: Rainbow gems are much more rare!
v1.7: Secret gives more moola!
v1.6: HIGH SCORE!
v1.5: New treasure: Rainbow gem!
v1.4: New upgrade!
v1.3: Adjusted the movement script for the player
v1.2: Adjusted the sizes of the treasure
v1.1: Added music
v1.0: Released