If you're having trouble with speed you need to grind some more you may not notice it but you lack the strength to kill enemies quick enough, which will get you stuck off screen if you hold the button down.
If you don't believe me go back a couple levels and look at the difference.
Is the star in level 24 actually impossible to get?
It's right next to where the speedup button is and I can't click on it or do anything else to make it fall down.
Hang on, hang on...
Just to make sure I'm clear on this, we can sell stuff for free, but we have to pay real money to buy an item that someone is already selling for more than it should be worth and then we can only buy stuff for 1 hour?
...
WTF?!?!
I kinda get it if you're trying to avoid the whole pay to win thing but on something like a market place it doesn't matter anyway most normal players aren't even going to touch it unless they think they can make a couple of extra gold on something or they can't sell something to a customer, I mean either make the trading thing entirely pay to use or just make it free and allow people to use coupons to get some money off a purchase.