Take a run up and jump into the Mini in the Mini Jump game. As easy as that. The only problem is that you need to try not to right yourself off.
To run in the Mini Jump game, press your H and J keys in rapid succession. The faster you press them, the faster you will run. To jump, press the Spacebar. The longer you hold the Spacebar down, the higher you will jump.
To add variety to your jumps can select how you want to land. The keys for the various landings are 5,6,7 and 8. Get creative in the Mini Jump game and see what overall score you can achieve with your 10 jumps.