Write the prompt around a playable rule
The prompt sets one spatial choice, one combining rule and one loss boundary. That is enough to test whether players can plan placement. Ask for distinct silhouettes or labels across tiers so colour is not the only clue. If chains can continue several times, request an animation that pauses long enough for the player to see which objects combined and why.
Original concept prompt: “Make a small drop-and-merge puzzle using garden seeds. Drag to choose a column and release a seed; matching seeds that touch combine into the next plant tier. The garden ends when the pile reaches the marked fence. Show the upcoming seed, animate each chain clearly, and keep the first board uncluttered.” This is a recipe for an idea, not a claim that this exact game is already playable.
Play, observe and refine one thing at a time
Try to create both a direct pair and a longer chain. Check whether a player can predict which pieces will touch after a drop, and whether the fence line stays visible as the pile grows. If a chain seems to happen by magic, request clearer contact feedback. If the board fills too quickly, consider adding a temporary rescue move or increasing the playable area.
Do not tune the combining rule and the drop physics in the same revision. First confirm that matching pieces combine consistently; then examine whether the next piece display supports planning. Use a written note such as “the seed slid past its intended column” or “tier four looked like tier two” to target one correction, then replay the same setup.
A merge chain is exciting only when it remains understandable. Avoid asking for a dozen tiers or special seeds in the initial version. Establish ordinary combinations first; if the game is too predictable, introduce a single rare piece or one blocked cell after the basic loop feels clear.
Playable reference for this prompt: Merge Drop. Drag to aim and release to drop candy balls into a jar; two identical balls merge into the next tier, and you lose if the pile crosses the line. Use this example to compare the proposed rules with a game you can try now.
Questions about merge game prompt ideas
What makes the merge rule understandable?
State exactly which pieces combine and what they become. A visible next piece and a short merge animation help players connect placement to the result.
How should the pile end a run?
Specify a marked height limit and when it is checked. Test a piece briefly crossing the line during a bounce so the result follows your intended rule.