Released ver. 0.4

Version Alpha 0.4 is finally out, sorry for taking longer than usual. After a series of frustrating bugs and no progression, I decided to rework most of the collision code (the buggy one), and it finally worked. Since I didn't wanted it to be only a patch to some bugs, while trying to fix them, I also finished making Level 4 and a new mechanic, introduced in the level. Now that I learned how to make my free time productive (Since I'm a student, I can't work on the game 24/7, so while in school, I brainstorm some ideas for levels and mechanics), you might see a lot coming in the near future.