This is the game that, when I saw the trailer for it, I had to play it. Luckily, I’m a games journalist, so I got it from the developer. But I would gladly have paid full price on this title if I had been required. Read on to find out why.
Description of Nimbus from Developer:
Nimbus (the 50,000th App on Steam apparently), from Noumenon, is a unique combination of racing and puzzling. The player controls a craft with no means of directly propelling itself and needs to use whatever is scattered around the levels to acquire thrust and reach the goal. 
Traverse a world map with several distinct islands in order to recover your lost love.
This is one of those action puzzle games that I quite like and needs to big backstory, extremely fancy graphics or voice overs. It’s just plain good fun, and frustration (in a good way). Because the rocket is falling, left and right are reversed and that takes some getting used to which creates some frustration. But once you rewire your brain, or your keyboard if you’ve got the ability to do that, you’re on your way to some seriously interesting and challenging gameplay here. Yes, still frustrating...
Each level requires you to use the environment to get your rocket to the end. This consists of cannons, bounce pads, turbo zones and just plain application of energy. But what goes up, must come down and so you have to learn to conserve the energy you’ve already acquired to make sure you’ve got enough to get to the next thing that will help you along. Now combine all of that with the ’backward’ controls and you can get an appreciation of what this game asks of you. It’s a physics professor’s dream come to life. Want to teach your students about energy, momentum and gravity, this will certainly illustrate your point.
