A broad drawing can resemble more than one picture. That is a normal comparison problem, and it can be an interesting part of a hidden-picture game.
Identify the shared feature
Suppose your sketch contains a large circle. Two images might contain rounded objects. Start by acknowledging that both fit the same broad feature. Avoid treating a common shape as uniquely decisive.
Next, look for another detail you recorded before the choices appeared. Position, proportion, or the relationship between two marks may help you describe the difference. If you recorded no second detail, leave that limitation intact.
Make a choice without rewriting the sketch
Follow the game instructions and select the picture that seems to fit. Your choice can remain uncertain. The game’s feedback will determine its result; your drawing can remain ambiguous afterward.
In your own notes, distinguish “I selected this image” from “My sketch clearly identified this image.” Those statements can have different levels of support.
You can use the next session to preserve a little more detail if it arises naturally. There is no need to force a complex scene just to avoid uncertainty.