I recently posted my game called "Parasite Invaders" on itch.
The game works well on desktop, but I’m having a lot of problem with it on iOS (phone and tablet) and on Android played in browser on Firefox.

The iOS devices show the game loading but it never completes loading.

The Android version loads but the images are cut off and the user can’t see the game buttons.

Are there any help documents you can provide with regards to these problems. i.e. screen size and resolution? I’m currently having a couple of friends try the game on larger android devices, Galaxy Tab and an Android tablet to see if they work better.
The game was created in Stencyl and exported to HTML5.

Any help or direction you can provide would be much appreciated.