The Bomb Jack-inspired game has three difficulty modes, and the aim is to collect all of the gems to progress to the next level. Avoid touching the nasties. Collect the snowflake power up to freeze enemies in place (you are an ice dragon, after all!). On easy and medium difficulty modes, you can pass through enemies when they are frozen. On hard difficulty setting, you cannot pass through them.
Jack Dragon is available in 48K and 128K versions from itch.io