Ok again if you take my advice and do this on playthrough 1 it will save you some time. Simply start the game and select play now and then go to area 1. When it loads change the difficulty to HARD and start. I didn't struggle much at all but that doesn't mean you wont. If you learn the patterns and again use the larger bombs (larger golden orb looking things) near the larger enemies it will flash red and blow up almost everything or usually everything on screen. Use the right stick to change the direction you fire to hit things coming from the sides and below you. When shooting forward or up i would hold the right stick up as well it seemed to fire faster and hit things quicker. After your done with area 1 do the same with areas 2-9. After this you will get the hard achievement along with all the area specific achievements as well. This should save you a lot of time if you just jump right in and do it like this.