So, the devs just announced on Twitter that they are working on a new project for 2019. According to them, it will contain a different UI and gameplay, and they also state that it will take at least 4-6 months of development time.
They also announced that they are working on another secret project that will be 3D with a 2D art style.
https://twitter.com/rustylakecom/status/1079803098338639873?s=19