Yeah the original was quite odd. Similar to Shamus in a way. The idea in the original is to rescue your little helicopter pal on each level. In this one you rescue an Oof (which is basically what my son has named these little stuffed toys he has - I think they're actually Puffles from Club Disney!)
So in a nutshell, on each level you have to find the keys, unlock the doors and rescue an Oof. The question marks are random bonuses, but you can also lose points, so it's a bit of a lottery. Shoot everything else. The lamps will kill all the enemies if you shoot them. You get a maximum of 4 lives. The pulsating things are extra lives, but you'll get points instead if you already have 4 lives. Energy bolts will boost your energy - blue ones give you a little boost, yellow give you a full boost. Keys will only work with locks of the same colour. Keys will also boost your energy level to maximum. If you hit F4 (black & white switch) you will start from where you last got killed (and all collected items remain collected) - until it's game over. In normal mode you go back to the start of the level each time and all items are reset.
As for the scanlines... Yeah there's lots going on. The count probably goes up when you shoot an enemy I imagine. Let's not look at the cycle count!
I've got my best people helping me fix the website. Some people can access it, some can't - which isn't ideal.
Thanks for the feedback.