Alright, where do I start. First of all, this game could have been A LOT better and it obviously has tons of potential. But there are just way too many flaws for this to be an enjoyable game as it is. First of all, the levels don't even tell you that you NEED certain upgrades to complete them. For example, I believe level 2 was impossible unless you upgraded jump a couple of times, and the big orb boss was literally impossible unless you upgraded the shooting.
Second of all, and I saw this was brought up by another reviewer, but the upgrade chart was difficult to know what you were upgrading. I'm assuming the clover meant luck, but I'm not sure what that means for the game. It took me a few minutes to realize that the target meant shooting upgrade. Just not enough information there.
Third, the controls were bad. I felt like I was sliding all over the place, and if I got hit I would just keep getting hit until I die with no time to get back in position. Maybe add some brief invincibility when you get hit. Also the shooting without an upgrade has virtually no range. Jumping on top of enemies was ok but need to bounce more. And the random spikes around each level were beyond annoying. They were barely visible and a lot of the time I had no idea I was stepping on one of them, and by the time I realized my health would be already all the way down.
Fourth, getting to the chicken was just simply ridiculous. Not only did you need to upgrade jump to max (which of course it doesn't tell you), but you had to get really lucky with the jump. Worst part is that if you didn't, you'd have to beat the skeleton boss all over again just to get another chance at the jump. That was one of the most poorly done parts of this game.
Game has potential but overall it was annoying to play. The medals of course is what makes people play it anyway, so that was a good part. Again, game has tons of potential but just too many flaws for me to consider it a good game.