Ok, so here is my next progress report:
- created level The Wastecanals part 2
- created level The Wastecanals part 3
- added new enemy - flying bell
- started creating How to play screen instead of Controls scene
- changed menu music
- changed intro music
- changed credits music
The game will contain 9 levels, 5 of them are now finished! Maybe I'll also create an endless mode.