I think the difficulty needs a little adjusting. I lost 6 guards with axes almost instantly around wave 6 or 7. So off putting I'm not even interested in trying a second round.
I've plaid a lot of incremental games but this is certainly my favorite. I hop you continue with development!
Might I suggest a hipster squid with a curly mustache and 40's fad haircut?
Also, nagging mother-in-law squid would be great too.
Sorry it just sucks you in. The Donut Shop (or any building for that matter) is good for the right situations. Look at what building types it boosts and put it around them.
Thanks for commenting. I added a difficulty option.