Arrow keys to move. The longer you stay alive the more attacks there are. 1. Thing that follows you and creates 10 clones 2. Moving horizontal line (Don't touch green) 3. Moving vertical line (Again, don't touch green) 4. 3 vertical lines (Bet you'll never guess which color you shouldn't touch.) 5. Background goes dark for 2 seconds.
I just decided to practice coding attacks if I ever add a boss battle in a game.