I actually don't know anything about there being a mission 1 and 2. Haven't played it yet Was just inquiring about it first.
OK then. Yeah this is finished and is downloadable here. I released it as a shorter game and spoke of it as mission one and waited to see what the reception was like. I intended to expand it into a much larger game with two more missions. I did start the next one but struggled with inspiration for level designs so shelved it.