i like the game but i think automatically having little chad in a slot and 4 other slots for babies would make more sense (also probably a shop item that lets you have a holy mantle-like protection for the door so you have an extra try if an enemy gets through) (also another shop item idea is one that decreases the placement cooldown by like 10%-15%)
the less babies cooldown should be an extra effect that the stop watch should have, because 99 coins for just a slow motion button doesn't seem worth it to me, most of the time I even forget that it's even there, either that or the stop watch should make enemies move and attack slower, not too much, but like a 10~15% would make it deserving of being a tier 2 item, even more with competition like the battery or schoolbag