Plain merging of dice numbers requires dragging them onto matching ones to combine them. i find the physics can be wonky sometimes.
Start dragging the dice onto matching ones to combine them, you must understand patterns and avoid crowded spots.
Controls are simple taps and drags with no upgrades needed. The game blocks your move if it is not allowed.
Most tip is to save higher numbered dice for later to combine them. You must keep moves to clear cluttered spots.
Q: What are the controls? A: Taps and drags are used to move dice.
Q: What is the objective? A: Drag dice onto matching ones to combine them.
Q: Are there upgrades or levels? A: Not stated in the description.
Q: What is the main mechanic? A: Dragging and merging dice of the same number.