Pick up 10 coins, die to spikes, a mine, and an enemy, and finish all 20 levels. Shift+Z skips levels, except for the last. Hold W to walk on the ceiling. ~5 minutes to 100%.
Pick up 10 coins, die to spikes, a mine, and an enemy, and finish all 20 levels. Shift+Z skips levels, except for the last. Hold W to walk on the ceiling. ~5 minutes to 100%.