This is a very belated Day 22 update post.
Sas put up a merge request for bombs a couple of days ago, but there were still quite a few bugs and missing bits from how I envisioned it, so I switched gears from building UI to trying to help out with bombs. Bombs were a bitch!
I estimate I've spent about 8 hours working on bombs since I started looking at them on Tuesday evening, so I'm now quite far behind in terms of building the shop UI and figuring out how to set up level progression... We're also doing boardgames again this weekend since our friends are almost heading off for a holiday in December, so I'm not likely to have much time to catch up this weekend.
On the upside bombs are done now and adding a flak cannon for the player to use should be a breeze! This screenshot doesn't quite do it justice, but you can see an explosion shockwave, a couple of pieces of shrapnel flying out of it and a visual indication of how badly damaged the bunker is:
I'll try to do a video update again tomorrow, which will show how cool it looks when all the bits are in motion!