When you press 1, 2, 3, 4, 5 or 6 a tower will appear where you're mouse cursor is. 1-PK Freeze (20 PSI, 1 Unit) 2-PK Fire (40 PSI, 2 Units) 3-PK Thunder (30 PSI, 2 Units) 4-PK Flash (75 PSI, 6 Units) 5-PK Ground (35 PSI, 3 Units) 6-PK Starstorm (100 PSI) There are three maps, Onett, Drago Plateau and Tanetane Island, that will randomly change each time you click the green flag.
Based on the Earthbound series by Nintendo. Please don't place towers on the path or obstacles, that's cheating.