Treasure Tower (proof of concept demo)

Story:
A young adventurer seeking a way to pay his tuition fees discovers a tower said to house untold riches. Upon entering the tower, he finds that all the treasure has been scattered throughout its many floors!

Controls:
Left + right arrow keys to move
Z to jump

Collect all of the gems to open up the exit. Touch the exit once it's open to progress to the next stage.

Be sure to avoid the green blob enemies. You can take them out by jumping on them (in typical platformer fashion), though you won't get any points for defeating them.

Keep in mind that your best score may not be saved. If you want to share it, be sure to write it down. Also, due to the game not having anywhere near enough levels to be worthwhile, the levels will loop with no ending sequence. (I don't think that'll matter anyway though, since this was made purely for demonstration purposes.)