I must correct my statements (see earlier in this thread). IAPs don't seem to be so bad. Made all stars in two areas now (15 levels and some more, 60-90min for profs, 120-180min for beginners), didn't buy anything for real money and I liked it so far. Start with "easy" and learn all the locations and enemies until you can afford second upgrade of fps gun (50.000 game money) and the super weapon "UAV" (Unmanned Air Vehicle; 80.000) maybe. So get Commando Jack during the sale lasts. A recommendation with reservation. But it's pretty entertaining. Here is a walkthrough/guide btw (accessible inside the app as well) with everything you need to know about the amalgamator: http://www.colossalgames.eu/blog/?cat=84
Habakuk, that's cool to hear. I was going to give it a chance anyway but glad to see you figured a way to work around the IAP... that gives me hope that I'll be able to do the same.