Vertigo is an arcade game that is completely free, open-source and cross-platform. I built it using Ogre and BulletPhysics. Mainly, I used the Dynamics side of Bullet, as honestly the collision part got me very confused and I never got it working, so I ended up using simple AABB queries to detect my collision.
At the moment it's compiled only for Windows and OS X, but Linux binaries will be coming soon, hopefully this week, and a link to the code repo will be given once I clean it!
The gameplay in a nutshell
You are a probe which is set with 2 shields to protect from fire and ice drones, but only 1 shield is active at a time. You will engage zones, each of which might have a different game mode and different objectives, and you'll be briefed once you're in. You have to flip shields in time to protect yourself, and you can possibly move left and right to avoid some obstacles. It's a pure reflex game, a brain teaser

Gameplay trailer
The trailer shows all 4 game modes and 3 of the camera modes. And I made it HD, which took 3 hours to upload to YouTube using my laughable 2mbps Jordanian connection, so watch it in HD!!!

http://youtu.be/6x6BfZNGabc?hd=1
Screenies
You can see different states of the game in a couple of the zones below (you can click them for the hi-res shots).




Links
Try it out! You can find everything at www.vertigo-game.com.
I hope you find it fun, and I'd love to hear any kind of feedback!
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Sidenote: there are things that are mystified to me about Bullet in general, mainly collision-detection schemes and controlling velocity. If anyone would be so kind as to help me out with answering a few questions, I'd be really grateful.