5 Difficulty Levels with Buttons:
Stage 1: 10.000 (Probability of 1/10,000);
Stage 2: 09.9990-10.000 (Probability of 1/1000);
Stage 3: 09.9970-10.000 (Probability of 3/1000);
Stage 4: 09.9950-10.000 (Probability of 5/1000);
Stage 5: 09.9910-10.0000 (Probability of 1/50)