I might comment a lot.
- A book that you unlock that shows what enemies do
- Speed up the game
- some enemies are fast but no towers have fast bullets so sniper has fast bullets?
- unlock towers after certain waves? Maybe as an extra mode or a difficulty for impossible where its hard mode but just the unlocking towers?
- Showing where the end and start is in easy? (I didn't know where the start was when I first played.)
If this is a hobby then Its very good! If this is a game that you are hoping to be big then it has a long way to go.
Either way, you can ask for ideas or just some feedback and I'm here! I love playing games and want to make one myself but I don't have the things or the knowledge. I also am artsy and have lots of ideas for books if I become an author so if you want a story or just random world building ideas I'm here for that too!
This has gone on for a long time but I didn't want to make this in multiple comments. (Feel free to ignore me if its too much and ill stop commenting)