Can't Unsee — an eye-training game for interface details

About this resource

Can't Unsee turns small interface-design decisions into visual challenges. Two similar UI cards appear on screen, and you choose the one that looks more consistent. Alex Kotliarskyi created the idea and implementation, while Amanda Hum designed the exercises. A tutorial introduces the comparisons before more demanding examples. Challenges draw attention to icon size and alignment, spacing, contrast, font weight and consistency. Some differences are obvious; others require looking closely at a small element. After an answer, the game reveals the result and lets you compare the alternatives. Explanations identify the detail that changed, helping you understand the decision rather than simply memorize the correct image. Scores and difficulty groups give the exercises a clear sense of progression. Try naming the reason for your choice before checking the answer. This makes the game useful as a warm-up before reviewing a layout, or as a starting point for discussing visual consistency with a colleague. It develops observation skills, while user research and accessibility testing remain separate activities. The public game is free to access without registration or installation and includes advertising. Its interface has responsive layouts, touch support and translations, including Ukrainian. JavaScript and image loading are needed. No separate open license for reusing the puzzles or application code is stated on the reviewed official pages.

Usage and licensing

Free to play with advertising. Idea and implementation by Alex Kotliarskyi; designs by Amanda Hum. No open license for the puzzles, graphics or code was found on the reviewed official pages. Free access does not grant republication rights.

Check the creator’s current terms before using this resource.

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