Yes! I got it to work! Now, next thing to go is player's transition between levels. And again I'm probably making things too complicated, while trying to think of a best way to handle this. Here is the thing:

I need to spawn player at correct positions, depending on which door he entered. F.e. when player goes from ROOM 1 into ROOM 2, then he should appear at the red circle (in the ROOM 2), same for the other rooms. When player goes from ROOM 3 into ROOM 2, he should appear at the green circle. I can only think of one way of handing this right now. Saving into global variable ID of the door, at which we should appear. Something like linking doors between each other. So door 1 from ROOM 1 is linked to door 1 in ROOM 2.. door 1 from ROOM 3 is linked to door 2 in ROOM 2. But I'm afraid this will get way too complicated at the end, and I'll mess things up, especially if there are going to be a lot of levels (99 level all with doors... linking all of them by hand? ). Maybe tomorrow I'll end up with better idea, but right now need to get a sleep, plus I'm ill this days, so I feel myself not that good...

Edit: yeahh, still trying to keep this forums alive with double, triple posts

Best regards!