Dig — free browser game

Dig is an original resource-management puzzle where you have to uncover an excavation site with minimum damage. In front of you is a 7×5 dig area; each cell has three dirt layers (3 = untouched, 0 = exposed) and below the dirt lies either a fragment of a buried tablet or empty bedrock. Every level the tablet is a randomly placed, contiguous silhouette whose location you do not know up front. You have two tools. The 'Brush' (hotkey 1) removes one dirt layer and never damages the tablet, marking the cell as 'sifted' — sifted cells give off a faint golden tint when there is tablet underneath, and stay grey when empty. The 'Pick' (hotkey 2) clears a cell completely in a single blow, much faster, but if it strikes a previously untouched cell that hides a tablet fragment that fragment cracks — still counts as exposed but reduces your score. Every move costs one energy unit, and if your energy runs out before the tablet is fully revealed the game ends. Strategy: brush the area quickly first (one stroke per cell is enough to read a hint), narrow down where the tablet sits, then use the pick on cells you have confirmed to be tablet to clear the remaining dirt fast. To complete a level the entire tablet must be fully exposed (dirt=0); each clean fragment is +10 points, each cracked fragment is −15. Each new level grows the tablet by one cell and grants four more energy — your cumulative score is saved as your high score.