HI De Jean, I was not able to replicate the problem in Firefox - to be certain I updated the build version and made a few other changes - like ship facing down at the start so that I know I am looking at the new application.
All seems to work as expected in chrome and firefox.

The two enemies are hardly enemies they just fly off at an angle - the game demo was purely to have a go at Smart Mobile Studio and see if I can use it to make games - and I can. I have made a couple since this demo - they are both not quite finished but I am loving working with SMS. The familiarity of Pascal with some awesome new features and also the power of css and the canvas. I would highly recommend checking it out.