This Kickstarter is attempting to raise $19,000 for Empire Eden, a side-scrolling run-and-gun action/RPG planned for Windows, OS X, and Linux. To help give prospective backers a sense for the game, developer New Horizon Games offers a playable tech demo, though this is just the chance to "mindlessly" kill the same enemies repeatedly to show off game mechanics, rather than any part of the story. The demo is available for download from this page.