Thank you very much guys! Now I've got my first 100 votes! :D Thank you very much for all your votes and your loyalty. :)

You needn't buy ammo. I haven't added that... And i think, i won't add that... Sry, but it would be very difficult for me, to familiarize myself with the source code, again. You can increase money, by killing the enemies!

Yes of course it's possible, as you can read in the posts above. Maybe it helps you, if you don't buy anything till you have minimum 450 in the easiest Mode. and then buy a red arrow. P.s.: the first 3 rounds you can pass easily, by holding space to punch the enemies! ;)

Yes... That's because there are just 13 levels... I'll see, if I could add some more levels... But it's difficult for me, because it was my second project ever and I was programming more complicated, than now... x)

Ah ok! No sorry... I haven't added somthing like this. But if you want, you are allowed to continue my work! ;)

@Yechiam Sorry. I don't understand exactly, what you want to now.