Tri-Filler

Core Gameplay & Controls
1.1 Board & Block Settings
The game features a fixed 8×8 grid board where all block placement and elimination actions take place. Three random classic tetromino blocks will be generated at the bottom of the screen as one round of usable resources. Block shapes are completely random with no fixed sequence. A new set of three random blocks will automatically refresh after all blocks in the current round are placed.
1.2 Placement Rules
Players can drag any block from the bottom bar and place it on the blank area of the 8×8 board. There is only one placement rule to follow: the block must fully fit into the blank grid cells. Any placement that goes beyond the board boundary or overlaps with existing placed blocks is invalid and will be rejected.
2. Elimination Rules
2.1 Basic Elimination Mechanic
A full horizontal row or vertical column (all 8 grid cells fully filled with blocks) will trigger an instant automatic elimination. All blocks in the completed row or column will be cleared immediately, leaving empty grid cells for subsequent placements. No extra confirmation is required.
2.2 Advanced Multi-Elimination Mechanic
Multiple rows and columns can be eliminated simultaneously. If one block placement completes several full rows or columns at once, all qualified lines will be cleared in a single move, granting multiplied scores. The empty spaces freed up by elimination can be used to place newly refreshed blocks, allowing continuous combos and ongoing elimination gameplay.