Thank you for this great game! I enjoyed playing it. The tutorial-style levels are super useful, but there is a spike in complexity indeed after it.
I’m not sure that I fully understood the logic behind the solar panels. How could it be so that placing a single solar panel, adjacent to two other solar panel, provides you with 7 points of electricity? According to my calculations it should be 5, but in that level, it gives you all 7:
Also I would suggest to allow players freely remove items from the grid. Now we only have ‘undo’ and ‘restart’ functions, which are not so useful on larger levels, where you want to experiment with the items that you placed first.