I ran into game design problem with my game

My game Green Screen is a puzzle game where you need to remember nodes to find them among other ones. Initially there was 3 categories: signal, frequency, data. Each category contained value that player had to remember and find. Difficulty was the problem. Frequency could be greater or less than a random value, Data contained 2 possible values to remember, Signal had 1.

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When my friends tried this game for the first time, they had hard time remembering everything and finding it among 20 nodes + the more values categories had, the more often weird bugs occured.

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I didn't want to frustrate player with excessive difficulty and extra bugs, so I decided to simplify the game by reducing possible category values. It helped and bugs disappeared, game became easier. So much easier that there is barely any challenge in it now.

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The question is, do I really need to make challenging game for the jam, or 3-4 minutes of light gameplay without too many variables to remember would be enough? What is more precious: lack of frustrating bugs or more interesting complex puzzle for the jam? Would be glad to discuss it with anybody

My game - https://ldjam.com/events/ludum-dare/59/green-screen