There was a long road from start of development till release on steam early access. We do a lot of work but still have a sense of poor content. We will add new content shortly. Best practice for us is to release new content every week... maybe every 2 weeks. Small portions, but it will bring new experience every week.
At this time we working on first update that will include several gameplay changes, new skill, new powerup, increasing level cap to level 9, new weapon, new achievement, improved tutorial and so on.
Come check our game. You will like it. It have great replayability and with released content can carry along several hours.
Any questions? Just ask it!