Deep in space there's a portal. The aliens are trying to use it to get to our world, and you need to zap them before they do. Rescue the astronauts floating out in space while you're there. Tap the correct button before tapping on the aliens or astronaut. Tap game screen to start.
Game art adapted from http://bit.ly/OGA_SpacePortal
Space Portal is the winner of the first Catrobat App creation contest:
Pocket Code allows you to create, edit, execute, share, and remix Catrobat programs in a visual, "LEGO-style" programming environment. You can develop your own games, animations, interactive art, e.g., interactive music videos, and many kind of other apps, directly on your phone or tablet. You can remix programs that others have made and share them with your friends and the world. With Pocket Code you can up- and download Catrobat programs through the Pocket Code community website at https://pocketcode.org/ --- All Catrobat programs uploaded to this site can be downloaded by anyone under a free open source license to maximize learning, remixing, and sharing them freely.
Catrobat is an independent non-profit project creating free open source software (FOSS) under AGPL and CC-BY-SA licenses. The growing international Catrobat team is entirely composed of volunteers.