I got a white exclamation point after level 35. I thought it was a joke and was looking for the upgrade button, but no, it really was a bug and I had to reload. Then it said I was ready for the boss...
I was literally about 5 seconds from quitting in the bar scene, as I could not find the last UV paint and vodka. I just started clicking everywhere and accidentally went into the bathroom, where the adventure continued smoothly. 4/5 - great click-through but could use a hint feature for the value of time.
No reason to upgrade beyond the helicopter. Save up for minigun and the game is complete. Disappointingly easy bosses and levels, but a good balance of income money. Stars don't appear to grant any bonuses, other than simply to collect stars. 4/5 had me come back for more.
Valde's voice acting was... interesting. I don't like how the game halfway pauses when the menu screen is brought up. I did that on the last boss to upgrade, got out of the menu, and WHABAM he's got both fists lined up to sandwich me FTW. 4/5
I don't like the fact that I have to buy the tea to fulfill Britain's orders, and they just take it and leave at an enormous loss to my gloriously simple black market.