Well, I made a mod. The code quality is probably not very good, and the elements are not fully fleshed out, but there are still 5 new elements so far!

You can find this mod on https://github.com/Jakav-N/The-Powder-Toy/.

It currently adds INDE, BOOM, HOUT, HTIN, CRST, ABTL, STAR, EBMB, and BOUN. It also adds the DMG tool.

Now, time for some descriptions:

• BOOM destroys everything except a few walls and INDE (it destroys DMND). It's very fast about it too.
• INDE is DMND 2.0. INDE is practically indestructible, and it works as an insulator. There is a way to destroy it, but I'll let you find that one.
• HOUT and HTIN are one-way heat transfer elements. Heat moves into HTIN, and comes out with HOUT. It should be nice for a lot of things, and anything that makes heat can be used in a reactor now!
• STAR has some nice graphics and also creates heat and pressure, making it an element with multiple uses.
• EBMB is an element bomb. When activated (pressure works nicely) it will create a bunch of its ctype element. EBMB (BCLN) grows very fast. EBMB will die similar to BCLN, but can be made to last longer with its .life property too.
• ABTL ablates with a lot of water whenever it touches anything besides water or ABTL.
• The DMG tool creates heat and pressure, but it also involves a loop over on both so it can also destroy things like PSTE and C-5.

BOUN and CRST and currently the most likely to be changed significantly. BOUN is intended to move back to where it was placed, but it doesn't work with copy/paste. CRST was intended to be a crazy crystal, an element that infects materials and spreads as radiation, but so far CRST is just a colorful crystal that spreads through the air.

I'll probably release the next version soon. I've made more elements (including one absolutely crazy one). There have been improvements too.

Edit:

V0.2.0 has been released!

I have added a DMG tool, EBMB, ABTL, CRST, and STAR.

Downloads are avaliable at https://github.com/Jakav-N/The-Powder-Toy/releases/tag/v0.2.0.

That would make sense. It's not well polished.