Will you be implementing Steam Achievements?..the game looks awesome and I would buy it in a heart beat if it has steam achievements. Thanks in advance for your time.

So i just finished my third gameplay and the game under 30 mins but I didn't got the defeat ancient evil achievement, do I need to do something specific? https://steamcommunity.com/sharedfiles/filedetails/?id=2003017153

Store page boasts that it can be completed in 'one go' lol

In my walkthrough, I missed the mermaid and after defeating the bull, I decided to go back and kill her, taking the drill, but to my regret, I could not go back to the bull. Or rather, the smog will return, but there is a wall that does not let me through further. Please fix this....

How many items are there in the game? Is it just the four you get from bosses (Bubbles, Double Jump, Drill Sword and Dash Attack) and 10 Heart Containers? I tried beating the game twice with all of the aforementioned items and the achievement didn't unlock. It doesn't look like I'm missing anything, unless it's hidden really well....