Your goal in this interesting puzzle game is to cross out all the squares in each level. Use YOUR MOUSE to click and drag to draw a line over certain number of squares (the number is written in the top right corner). All squares you cross out must be in the same row or column. If you get stuck, click that button in bottom right corner to restart the level. Crossblock automatically saves your progress. To pick up where you left off, click Continue at the intro screen. Can you solve all 50 levels? Good luck!