Ventilator Shark's great looking parkour platformer, Space Rabbits in Space will be coming to Linux.
I spoke directly to the developer, who (slightly amusingly) said "There will be a Linux version, we just don't have ETA on that yet (2 people, 1 dog, exhausted to heck [we are, the dog is fine])".
Take a look:
Originally a mobile game, it released on Steam recently with over fifty levels to complete. It also includes online asynchronous multiplayer, leaderboards to see how you stack up against the competition, a replay system to study the fastest players and hilariously "Broken English as an added bonus included free of charge".
They've already provided me with a key, so I can be ready for when the Linux version does release. If interested, you can follow it on Steam.