Old-school lil-dozer tractor (on tracks)

First attempt at making tracked vehicle. It's a small vintage tractor with a buldozer shovel and a 2-speed gearbox. How to: First thing to do is to enable track tensioners - press J button and wait till the tracks are all nice and stretched. The tractor doesn't have a throttle, instead the engine works at constant RPM and the movement is initiated and stopped by engaging or disengaging the clutch. To start or stop the engine press Y. To start it in reverse press R. To engage the clutch press T. The tractor will start moving. To disengage the clutch press G. To turn press F or H for left or right turn repsectively. These keys stop left or right track. To go faster switch to High gear by pressing U. Press U again to switch back to Low gear. Press L to toggle lights. Bonus actions: Insert/Delete to raise/lower the front shovel; Home/End to raise/lower the rear tailhook rack.