Okay. Here are some IMPORTANT things you need to know about this game.
1. Treasures (diamonds) and various health-boosting foods are not only found in treasure boxes. They are also hidden in various areas of each stage. So, make sure you take your time finding them as you go.
2. Most enemies can be defeated easily. You just need to step on them with your cane while jumping. In fact, you have to jump like this throughout the stage.
3. Each stage has a map. However, some areas are hidden or can only be accessed once (easy to miss). These areas contain various treasures and secret items. Usually in the corners of the map. Make sure you look for them.
4. Some treasure boxes are too high so you need to open them by swinging rocks at them or using missed enemies as stepping stones.
Good luck and have fun