1. Click the green flag in top right corner of project 2. select your difficulty ( use mouse ) 33. put your first tower down ( always make sure you have enough $ ) 4. click "NEXT ROUND" 5. use your mouse to aim the towers and shoot at the enemies 6. repeat steps 3-5 for as long as you can :-D click p to see pops click t to see your tower history click a tower to delete it