This is an awesome platformer. I played thru normal and hard mode and had a great time. Some of the last jumps on the last level on hard were really tough, but the checkpointing is pretty nice so I wasn't having to redo too much which was very nice. The art all looks great, I like the design of aquabot. I like the boost mechanic, but it took me a bit to figure out that you want to use it at the start of your jump to maximize how high it sends you, it'd be nice if it was more consistent so you know for sure how high pressing the boost button will send you. I think the control scheme is a little weird, I prefer to use arrow keys for movement when I play platformers so it was kind of a bummer that down on the arrow keys was the boost button. I think it'd be a good idea to set a maximum fall speed as well, there's a lot of blind drops in this game and once the player starts falling really fast you don't have any time to try and avoid obstacles.
This is awesome tho, I had a great time playing thru it!