Thank you for descriptions, kinda true i didn't notice effects of some pills, though specifically tried checking. For example placed two similar babies next to each other and pilled one - only Power, Health and Shield are definitely noticeable. Well, will have to trust all Do work.)
Probably true, i was unlucky to get spawned coins or missed them under enemy wave/many actions at the same time. Still flaw of "what wasn't bought is lost in next shops" remains, and definitely player can't buy a lot in first shop, while later will have expense of coins for nothing to spend. So it could be cool if items either reappear in next shops, or there appeared some extra options. Like say pay some reasonable price to re-roll shop and get more items right away.