For the first time in history it gonna start raining man I became a little bit motivated and figured out that its possible to speed up game performance on low end mobile devices, Android in this case. Apparently "browser like" game wrapper for android have horrendous performance problems. I mean, its a product of guy who have no idea how to code like at all, so...
Instruction how to do so
Download desktop version.
Extract it.
Go to %game folder%/resources and copy folder app to you phone.
After that launch you browser (I used chrome) and navigate to to the copied folder and launch index.html (for chrome and case where you copy folder into the "root" of the device just type in address line file:///sdcard/app/index.html).
Boom, game runs much smoother and faster than in provided wrapper for android .
Optionally, if you also delete/rename folders CG, cheevos, combatBust, crops, fulls and icons in app/resources/bitmaps you get even more performance boost. This remove all of a pictures from game btw.
Tested it on my crap tablet from 2015 that I use to read books.