I actually enjoyed a lot the physics of this platform combined with the 8 bit chiptune that accompanies the player during the levels. I like how difficulties increases as you progress, and I find them balanced. The mosti difficult task was to control precisely the kid when jumping between piranha plants and walking goombas in order to land in a safe space and avoid getting hit, but at the same time it's the part I loved the most because of its challenging nature. Once you get to know the timing and correct pressure on the arrow key, the game becomes easier to handle.
Despite this the different challenges and the fact that you have to be on the ground to swap the planet's sides keep the player focused on not losing track of what needs to be done. I liked the medals too because they functioned as a rewarding system after completing a level. The music was really enjoyable and, along with the difficulty of the levels, is one of the things I loved the most starting from the menu to each level. The graphics fits the nature of the game and its goals. One thing that made me struggle a bit, asides from certain levels, was finding the hidden golden rocket. I ever replayed each level, thinking it was in one of them but then after a potential third attempt I thought "what if it's in the menu?" and so I found it.
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To all people who are still struggling to find it, here where it is:
https://www.newgrounds.com/dump/item/242cc986507fb0d081bccb194f187ec9
After clicking start you will see this screen, click on the rocket at the bottom left corner. I know that for some it was easier but because the game immediately makes you want to try it, it's easy to forget about this small, lovely detail.
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Good job, because I had fun with the difficulty, levels, enemies, physics mechanics combined with good timing and arrow key pressure, and the music I gave it 5/5