Android version not working when I begin the first level
Do you mean the demo version or the purchased version?
HTA-Android.Demo.apk
or
HTAv.0.2.1.apk?
Full version not demo
Its HTA-Android.Demo.apk
Known issue for android and making a rebuild version of it. Currently there are only five levels playable and a new enemy that was not available in the old version. You can find apk file in the demo section.
Which one from demos?
Look for this one 'HTA-Android.Demo(NoURP).apk'.
