DeepCore is an old school platformer/adventure game, inspired by such classics as Starquake, Montezuma's Revenge and Fury of the Furries.

Navigate your character through a set of dangerous caves, to reach the Core Control Room and save your planet. Morph into different colour forms with distinct abilities to help you in your quest.

Check it out here: https://yatchan.itch.io/deepcore

The game is as usual 100% free, with no ads nor microtransactions! You can play the browser version, or download a Win/Linux executable.