Some facts to set out for new players
First, There are 3 of "you". The one with the yellow circle is you. The "Your Best Run" Blob is like a ghost player which lets you see the things you did to do your current High-score in the map. The last one is the Blob which has your name, It is you. Like your "Your Best Run" Blob it shows your best run but this blob is the one visible by other player.
Second, The upgrades are Run Speed,Jump-Height,Double-Jump Height. Run speed gives you flowers while running. It makes the map harder so it is recommended not to be upgraded much. Jump Height is, for me, the most needed stat of all. It affects your jump greatly and needed to pass such obstacles. Double Jump Height doesn't need to be upgraded much too. It isn't being greatly affected but needed to pass such obstacles too. You need flowers to upgrade them. 2400 flowers is needed for each stat to upgrade fully.
"+" This if you want: Shops,Checkpoints or maybe a Save option,In-game Achievements and Badges, One-of-a-Kind Bosses, More game modes, Item Forging, Towns, Mana and Health Potions, Quests,Interactive NPCs, and most of all..A Sequel. Well that's all my suggestions. :D
Great game! One of the classics Nerdook has made following some of his other creations. Multiplayer is a great add-on to this game since it can show the interaction and competitiveness of players.
Nice game. Not quite in luck, but more in strategy. I'll hope for more games like this yet though it needs more advancement. All I can say is good job. 4/5