itch.io

I played browser version. The upgrade that broke for me was on of the top speed pickup upgrades. Top speed power frequency once it is at level 9 says under it Cost: 0, Max: 15s. It can b bought again after that for 0 currency and then the image for the power up disappears and the Max:15s is replaced by <null>.

I really like your game. I've played it a couple times now. A couple of notes though. Its best to go as slowly as possible. In fact the only stat that it worth investing in is handling. I get top speed to 10 to unlock the KM coins, then dump everything I can into the upgrades for them and handling. Because they spawn based on time and not distance, the more time i spend in one spot, the more coins spawn in one spot. Then when i go through them incredibly slowly, hopefully hitting as many obstacles as I can right before them to make me slower, I use my high handling to go left and right really fast through them to collect them a lot of times. Because they don't despawn, I can collect the same one multiple times again increasing the "number" of coins on the track. The coins give WAY more distance currency then the actual driving and there is no reward for moving faster. Once I have the insane amount of currency from this then I can increase everything as much as I want.

I've also had one or two of the multiple upgrades break on me once it's maxed out. It shows no text and the image just goes away. At that point it will not show up on the track anymore.

However I really like playing it like I said, keep going with it!