it would have been nice if you had asked before you went ahead and did this.
my app is still a work and progress where I am actually programming and i am still doing changes. editing the apk by changing assets and calling it "new features" is something i dont necesarily agree with. if you wanted to help me with the gui design you should have asked. I also added a skinning option so people would not have to full edit the app... I obviously cant prevent anybody from doing as they wish on the internet, but do me a favor if anything please remove the trademark fake line from the bottom of the launcher. Last thing i need is somebody sending me a takedown notice over confusing a modified version of my app to my own.
Also if you are re-signing the apk after doing changes you can cause issues for people trying future updates of my app if they have installed your modified version previously.
also since you mentioned you have applied fixes, what changes have you done?