Ok, end of day two. Got some basic Ashley components and systems up and running. Made some (very) basic graphics in Inkscape. Put the two together...
And then spent ages fighting with maths trying to get bullets to fire from the right location...managed to make a pretty bullet hell pattern in the meantime though.
Finally got it working, added in a FiringSystem with a spawn timer, all is good.
Next need to add some pooling, I'm creating too many Entities!
Then onto collisions I reckon.
I got stuck with some Kotlin code earlier, and got some really great help from the Kotlin slack channel. I'm impressed with the community that's built up around Kotlin already, and in its uptake in the Java world in general, as is evidenced by this game jam!