Ops, you're seeing shadows...
Yes the truck works like the plane, train and balloon. You need to watch out for 2 things - make sure you submit your last order before the truck timer runs out and get a reward of cowbell(s) for your truck.
Here are some steps for you to try:
1. clear cache on your device
2. delete FS2 app (make sure you have your Storm8 ID and password)
3. restart device and install FS2 app
4. start FS2 without other apps
5. leave it for 3 mins
Once you have done the above, the graphics on your farm should appear. Now, i like you to check your farm to see if you have lots of animated decorations on display. Try storing some to reduce the strain on your device (not sure what device you're using but reducing animations will help on older devices) so at least you can have a smooth game play experience. Usually reinstallation will reduce the app size and help to get things running better. Please let me know if you are still having issues after trying. All the best.