You can change difficulty by clicking the difficulty button. And you can change maps by clicking the map icon. Don't drag towers to place them just click it and click where you want to place it.
update log below 2023: August 6th: full game release August 7th: game production dropped October 24th: game picked back up! 2024: April 9th: Started work back up on this project. April 10th: Made new extreme mode April 11th: fixed the hard and extreme modes, and added two new turrets. April 23rd: changed enemy models. April 24th: I Quit scratch September 6th: Rejoined scratch, fixed the easy mode buffed the laser, double, basic and tank towers, and semi-added a new tower that is really buggy, will be worked on more tomorrow. 2025