trouble making stage textures

[ReesesPieces]

i just started making my own textures, and i followed this video

<a href="http://www.youtube.com/watch?v=c32UpTh4RiA" target="_blank" class="aeva_link bbc_link new_win">http://www.youtube.com/watch?v=c32UpTh4RiA</a>

i have everything fine up until 5:10. right there i get a message saying:
"The final size was too big.  How to solve this:
Reduce the palette on +1 and +2
-OR-
Simplify the patterns on normal textures.


I dont know what this stuff means, so if you know can you explain it to me please

[ピカノ]

It means the image is too large / complex.

Stages are compressed, and if your images don't compress to the same size or smaller than the original... it won't work.

So... you can reduce the pallet (even for non-indexed)
Image > Mode > Indexed > Some number (lower == better compression, but worse quality due to lack of colors)
(But if the image is not-indexed, you'll have to set it back to normal but Image > Mode > RGB)

Otherwise, you can make the image simpler.
A black square of 50x50 will compress to a smaller size than a rainbow gradient. If you're image is too "busy" it might suffer from this.

In most cases, stages contain at least 1 large image (bigger than the rest, something around 512x512 or larger) --- if you apply one of these steps to said file, you more than likely won't have to be so stingy with the others.

[ReesesPieces]

am i supposed to do image from paint.net? cuz i tried and theres no mode. if i hit resize instead will it still work?