Minor patches

Something was keeping me awake, so I decided to make a small bugfix. 

Now the keyboard sounds sound better, the sound in the secret ending has been added, and the doors in the starting room have been fixed, now they are illuminated correctly and even make a sound!

But the most important thing is that the character's movement system has been changed, which has increased convenience, reduced inertia and removed multiple crutches.

I was definitely fixing something else minor, but I safely forgot about it, because I had 3 hours left to sleep...