Aww, you made it harder!
I remember when you could go through the first couple of levels with nothing but the airgun and have 100% armour.
But I beat it anyway :).
Anyway.
I only gave you 8/10 for sound because every so often there would be a sound of loads of bullets coming out at once; it was very loud and distracting.
Humour I gave a 5 because it wasn't meant to be a funny game. I did like the little notes, and the shopping list.
I gave you 8/10 overall because, like I said in the title, you made it harder :( ! A save function would also be much appreciated.
P.S.
Are there any unlockables you have once you complete the game? I couldn't find any.