1. Level upgrades depending on color
2. Each effect have unique visual effects, which I created by myself
3. Each effect depends on chosen color and interpolate (blend) its value on neighbor colors. Example: level-uping red color will also increase orange and pink but not cyan
4. Each upgrade has name of color
5. Auto-aim got better code
6. The code architecture has become nicer
7. Quit button
8. Less movement slip
9. Enemy upgrades
10. Tips