Looks a bit too much like it was designed not to work
A few issues that spring to mind...
- Huge vertical offscreen build area. this might be usable to actually produce a solution (perhaps using a winch), but building complex stuff offscreen is a bit too annoying.
- Goal area does not cover the pit fully, on the left side of it, so keeping pieces in the goal (if you can even get them there) = hard.
- 2 balls at the top that are rolling into the goal right away are kind of pointless because there's very little you can do to interact with them before they hit the goal anyway.