Action Henk (RageSquid)

"Action Henk is a speed-running momentum platformer, played in a nostalgic toy world. Action Henk’s core gameplay is platforming as fast as you can. Run, Jump & Slide in this 2.5D platformer and reach the finish as fast as possible." - Author's Description

Why play it?
It's the closest thing to a proper Sonic game I've played since 1994. It's still fairly early on in development, but it's already plenty of fun, and quite polished. - Lewie

Play here (Browser)