content in my project:
- icons from https://www.iconfinder.com/
- Weapon Bomb Explosion Sci-Fi Plasma-04.wav and collect_item_hurry_out_of_time_01.wav and XMAS Grains 1.wav from free packs from https://sonniss.com/gameaudiogdc2017/ and https://sonniss.com/gameaudiogdc2016/
- picture of magnet from http://imgpng.ru/img/technic/magnet
- all other content is provided by me