So the challenge is over. As I had final exams this week, I went with something rather small. The result is "DEEP SPACE", a kind of space shoot-em-up game. Yesterday I worked and included sound and music when I was with my grandparents, and before heading home, I put everything on an USB flash drive as a .zip file, to test it again before uploading. But for some reason, the .zip was corrupted, and I could not open it. And before I knew it development time was over. And therefore, the game comes without music and sound :(.