Stop those colored enemies! Don't let them cross the map by building towers which shoot at them as they pass. The color of the enemies grants them resistances and abilities, so you have to combine different towers to defeat them. You earn money for each kill, which you can use to buy or upgrade towers.

Catch the falling leaves and try to attach them to the tree in the first level . Catch the flowers and try to attach them to the tree in the 2nd level . Similarly try to catch the fruits and attach them to the tree in the third level.

Defend outer space from enemy spaceships. This is a simple tower defence game. You know the drill: buy and upgrade towers, kill enemies, get to the finish. The game gets progressively harder, and there are 100 levels. **Note** It glitches sometimes when the game is over. If it doesn't go to the high scores page after the game ends, right-click and click Forward (you can do this at any point in the game if you want to submit your score without finishing.) If you discover any more bugs/glitches, please either PM me, or leave a comment with them. Also, when you get into the high levels, it tends to lag. This is something I don't know how to fix, so you will just have to deal with it.

In 2012 we established a base on the mars. Only to find out we are not alone and not wanted there! ~ Defend your outpost from all attacking enemies! Use your upgrades wisely to defeat your opponents or nuke them off the planet!

Friction Physics 2 - Friction Physics is back with more fun levels, better graphics and gameplay.