Cool concept, it was kind of like reversed worms! Nice simple and a lot of fun.
It felt like the difficulty started to spike quite dramatically at around level 11 but overall the intro into the
game play was quite smooth. I also liked how the tutorial was incorporated into the building site. The elevator re-spawn was also very cool.
A couple of minor things for some feedback. I though the score screen disappeared a little too fast, and it wasn't quite clear what the pickups were for. I also think it would have been nice if
the music continued between levels rather than restarting each time.
All in all great little game!