oh my..

nice twist on spot teh diff but oh my how hard it is to see anything.
may i suggest moving to art work rather than photography it may clear up ur resolution a lot

Not great but I played.

Concept isn't new, but I still had a go. Works well and the Mirroring idea works well, adds a little challenge.

Possibly use higher resolution because the distance makes some of the differences hard to spot.

Good job overall. 6/10

I like it...

Nice music, nicely hidden things, nice images,

BUT: some of the differences look shopped, and the error marker should either change by the size of the differences or the image should get back to the original somewhat, and you could use images of a bit higher quality/resolution.

Well..

This is a bit hardcore difference game cause the picture is actually the reflection of the other one making it more challenging ! very relaxing music...and the best part...no timer ! i actually enjoyed this ! well done !