Hey Eduardo, saludos desde Argentina!

I tried the tileset generator, on HaxeFlixel. My tiles are 35x35. Used Bitwise export option.

Here's the input:

Here's the generated tileset:

Here's ingame:

Now, there's some things:

First of all, the generated tileset has a gap. Not sure if that was intented, but is visible.

Second, there's some cases where the tiles just won't be placed properly. Works 90% of the time, but a bottom left corner ends up missing sometimes. Not sure if is a problem on Haxeflixel's end or what.

Regardless, is a great tool, super practical, but wish there's some way to make it work perfectly.

If you know what's up, please let me know. Thanks a lot!

EDIT: tried your original tileset, same results:

EDIT2: Just noticed the tile gap is not present in your tiles. Perhaps it was a problem on my image input.