Click and drag to move pieces. Put your mouse on a piece and press space to rotate it. On mobile tap and drag to move pieces. Tap on pieces to rotate them. Try to fit all the pieces in the grid without overlapping.
This is based on a puzzle that I found in my classroom. I couldn't figure it out so I made a digital recreation so I could try and solve it at home, and so other people could try it! Sometimes the pieces won't fit in JUST right but that's just a graphical issue, don't mind it.