Two things. One, that dark grey text on black field is killing my eyes. Only score is visible, please make text in a lighter color (such as light grey). Also, killing two enemies at once gives you a super jump.
PPS. Since there is a wall on the end of Lv. 1, you can wall jump. There is small place where there is invisible, but solid platform, at the corner above the goal. I just walljumped to it.
There are still some invisible walls slash roof on Lv. 1. It's on the very top, you can access it from a platform. It's roof because you hit it from bottom but also wall since you can also hit it from left. Also quintuple jump is OP, I can just skip portion of level, including leaps of faith.
PS. Enemies still deduct 500 points instead of 50.
The invisible roof on level is purely there to stop you from jumping on top of level, and therefore cheating a little bit. The extra jump feature will be regulated in next update. Enemies deduct 500 points, but you also gain a lot more from coins.
Interesting. I had like no wood because I bought church and about 10k gold. Then I went off to eat dinner, PC went to sleep mode or something like that (the screen was black because of inactivity) and when I was back, I had over 30k of wood and 20k of gold.
Also on Firefox lags are more common than you said. Sometimes it lags upon completing level, but it also lags in MIDDLE of a level. Which can be annoying.
 "Sk8bit"){kind=icon}
 "no-one has to die."){kind=icon}
 "Ghost Hacker 2"){kind=icon}
 "Magnetized"){kind=icon}
 "Ninja Slash"){kind=icon}
 "Give Up"){kind=icon}
 "Paradoxal Platformer (Alpha)"){kind=icon}
 "MadBurger"){kind=icon}
 "Bunni: How we first met"){kind=icon}
 "I'd Like To Be The Captain"){kind=icon}
 "Ragdoll Cannon: Level Pack"){kind=icon}
 "One Sturdy Box"){kind=icon}
 "Pong Fantasy Quest"){kind=icon}
 "Avant-Garde"){kind=icon}
 "Fear Less!"){kind=icon}
 "Epic Battle Fantasy 4"){kind=icon}
 "Bubble Sky"){kind=icon}
The invisible roof on level is purely there to stop you from jumping on top of level, and therefore cheating a little bit. The extra jump feature will be regulated in next update. Enemies deduct 500 points, but you also gain a lot more from coins.