First Dimension gives you antimatter every tick. Second Dimension gives you First Dimension every 10 ticks. Third Dimension gives you Second Dimension every 10 ticks. etc.

When you buy 10 of any dimension, its cost is dramatically increased but its production is doubled. "Until 10" buttons buy Dimensions until the next production double. If the tickspeed is under 100, its slowed down but production is increased matching it.

Resetting unlocks you one more dimension and boosts your other dimensions. First reset gives you x2 to First Dimension, second reset gives you x4 on the First and 2x on the second etc.