All purchases add more.
Defend your base from a series of weird and freaky monsters. Build defenses to prevent them from reaching the portal.
If you have troubles with saving the progress in the game:
1. Check if cookies are turned on in your browser
2. Check if your browser does not clean cookies when it restarted.
3. Turn off any programs that can clean cookies.
Click, hold and drag the mouse cursor or WASD/arrow keys to move the screen.
Use scroll wheel or key +/- to zoom / zoom out the screen.
-1,2,3 – spells
-space – speed up/ down
-enter – start the wave