Space Survivors for iPad is a very fun puzzle game based off of physics. It was created by Single Button. You control one or multiple astronauts and maneuver them around the level collecting stars and reaching the exit. On the way to the exit you have to try and avoid spikes, black holes, and aliens who will instantly kill you and you will have to restart the level. Space Survivors has 20 levels and and easy and hard difficulty. The so called easy mode is actually very challenging and that always makes for a great game.
I recommend you check out the game. The only issue I had with it was the music. It got a little repetitive but luckily you can turn it off in the settings. I also would of liked to see the option to change the controls to tilt. It would make it a bit more interesting to tilt your iPad to control the characters.
Currently the game is priced at $0.99. Go and check it out!