Yes, the controls are very tricky, I know... Maybe too much... The idea was to make the player take a balance between speed and control.
Spider web is spawned when you move fast, the bar shows your remaining web charge. The power ups are extra web charges.
The web damages the flies, being destroyed in the process (The fly slowly gets "wired", so the web ends attached to the body of fly, reducing its health, when this is reduced completely, fly gets wired and is killed). This is intencional, but I should have shown it more clearly.
Thank you for your opinion, I'll take into account the tutorial for the next jam and for future versions of this.
Viewing post in Wire Spider jam comments
For short game jams, a simple tutorial screen with text (and maybe images) explaining the controls and the mechanics of the game (basically a short version of what you explained here) along with a sentence explaining the objective is usually enough, but it goes a long way. Definitely a lot of potential here :)