Some ground based enemies / traps would be a nice addition to give you something else to look out for. Besides variety, I think you need to balance the ghosts at the start, they are unfairly hard when they spawn on top of you. My final suggestion is to add some sort of obtainable goal. Like a certain number of ghosts in a limited time.
A duck walked up to a lemonade stand.. and said to the man... running the stand... Hey! I reviewed this game on twitch, you can watch it here > https://www.twitch.tv/videos/790366622
We plan on adding much more content. Many puzzles have been designed fully but lacked polish or were half implemented. We simply ran out of time. Please keep an eye on this game. I would love to finish it someday soon.
