Made in around 32 hours for the 2025 LÖVE Jam. It's more or less just a direct implementation of Chegg. Multiplayer PVP only, although you can play solitaire with no threat, or launch two copies locally and have them connect to each other.

To play, you must first build a deck and convince someone else to do the same. You have Hearthstone-like mana, increasing by 1, up to 6, and refreshing at the start of your turns. Take it in turns dragging cards from your hand onto the board to summon them for a cost, starting with your king on turn 0. Your summons need a turn to act, after which each gets an optional free move, and, as described by their cards, then can either move again for a cost, or attack for a cost; usually 1 mana in both cases, in all cases, performed by dragging them around on the board. Attacks generally defeat everything they hit, and you win by defeating the opponents king. Beware of friendly fire.

You can also drag the board around and zoom it in and out with the mouse.

Source code.