The mower controls the machine to pack the mature grass and sell it to the store in exchange for funds, which can be used to upgrade the tool: speed, blade sharpness, and the income generated by mowing, etc.
If the tool is not upgraded, some grass is difficult to cut and the income is very low, so you need to constantly increase your income to meet the needs of building more buildings.
Controls
Use WASD / arrow keys / drag the left mouse button to move around.