Tetris

Fun, cute, and well done first level! There are some fresh elements that you used like the corridor on the top of the building and the courtyard with inward facing stair blocks that I have both not seen for a while. Great upload too with the title and description. The puzzle itself was similar to some of the earlier original levels (so rather easy), but worth a go. Thanks for sharing.

P.S. You may have noticed that one of the rails sometimes falls apart, namely the one where the motor is facing in the opposite direction from the others. In the other three cases the motor is attached to the rail at its anchor, meaning the motor will be anchored by the rail, and thus be able to spin in relation to it. When a motor is placed in a level such that its anchor is not touching another block, it behaves as a free-movable - meaning that it can be moved around freely by other objects in the game. Any other metal blocks attached only to the un-anchored motor will move with the motor as a unit if any part of it is bumped.

In your case the rail that can fall apart is attached to both an un-anchored motor and a slider (sort of). I say sort of because sliders don't actually attach to any other blocks at their ends. Only during play do the sliders check if there is a rail by their ends that would then dictate their range of movement. So the rail pieces actually associate with the motor and not the slider - and thus they become part of the free-movable and can then fall over.

If the rail pieces were attached to any other block that can move such as a draggable, slider (tangentially), or motor that is anchored to something else, then they will similarly connect to those before being considered rails for the sake of the slider to slide on them. And thus, again, the rail can break off from the slider meant to slide on them.

I haven't finished yet the level but this is the first time I see that . @nGord gave a great description, here is a picture of the falling rail

Spoiler: Rail with motor falling

Not a big deal but interesting...

Great first level! The design and the way to resolve it are nice.

Spoiler: Improvement?

I thought first that I needed to use both B and R bots in order to get to the win spot. Eventually I didn't need R bot and managed it only with B. If we would have been obliged to use R bot in collaboration with B, it would have been perfect.

Indeed that's a wonderful first level! Welcome in the forum!