Zippy the Porcupine

Zippy the Porcupine is a homebrew fangame made in 2015 by Chris Spry, the same programmer who made Princess Rescue

Story
One day an airship came to visit Zippy's happy, little, peaceful land. Curious, Zippy took a peak inside and was overwhelmed with all sorts of gadgets and things that he had never seen before. After a long while of exploring, Zippy found a nice place inside to take a nap. After his nap, he left the ship but found that he was in a whole other land! The ship must have taken off to this new place while he was sleeping. But before he could think of what to do to get back to his home, he noticed someone exiting the ship, riding a smaller air vehicle. This mustached man looked strange to him, but his appearance was the least of Zippy's worries as he noticed that on the vehicle were the five power gems from his home! He must have stolen them! Those gems can be dangerous in the wrong hands! Now it's up to Zippy to get them back and return them to their rightful place

Gameplay
Run around at high speed with Zippy the Porcupine through 16 different stages! Collect the rings and pop the enemies with your spin jump. Getting hurt by an enemy will cause you to lose all your rings, but you can get some of them back popping the same one. Find the bonuses as you move along, including the springboard at the top of the levels that will take you to a bonus ring collection stage. Collecting 100 rings will earn you an extra life. Finish a level by flipping the sign by running by it at the end of a stage.

Zippy the Porcupine features 16 levels in 4 different zones, an overworld selection map, 5 individual boss battles, gem collecting, and ending sequences, all packed in just a 64K cartridge.

Trivia

 * Unlike Princess Rescue, which later taken down by Nintendo for copyright infringement, Zippy the Porcupine remains available until now on AtariAge website.