people with QWERTZ keyboard (german) who want to get the achievements 133, 136 and 137 have to press the keys 'ö', 'ü' and '0' in that order. took me a while to find that out ^^ pls vote up.
For Level E8, if you were too hasty like me ^^ produce a fork-shaped piece witch measures 1x2 and drop it into the shaft from as high as possible. It will push the red thing towards the exit, if you done it right.
If your game becomes slower and slower the longer you play, make sure that everything is getting killed after it left the screen. For example I forgot to kill the ships missiles.
if your health meter doesn't move, also make sure that your healthmeter on the scene has got the instance name 'healthMeter'. check this in it's properties. i needed 3 hours to find that out -.-
another problem: my game does only support 2 buttons pressed at a time. for example if i press space, up and right at the same time the ship only moves upwards and is firing :-/
my missiles start somewhere behind the ship. i can correct that if i change the line in the ship.as to missile._x = _x + 470;. then they start at the nose of the ship. but that's not according to the tutorial? oO