very fun idea. the garyscale level with numbers stading in and out of shadows was very hard. The small numbers were often hard to select. Mby the players could find special Characters around the map to unlock special abilities (wallhack for a second, auditiv ping). This could reward otherwise "unproductive" searching segments.
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The small number collisino detection is a known issue, I added a crosshair which indicated when a numbe is clickable.
I like the idea with special abilites - I thought about PowerUps which give you a little advantage for a short time. Auditiv Ping sound like a good PowerUp, but than 3D audio is required - so maybe combine auditiv ping with some visual direction hint :)