Love the frog-mech and the boss design too.
Opening cutscene has a lot of charm (could have done without the "yehe boi" sound though imo).
Just needs some more polish on the audio department. SFX volume is not well-balanced and I wish there was some BG track present too.
I also don't understand the wrench and nailgun pickups. I image one heals me (but I don't know my hp) and the other is ammo (but I could not seem to shoot in my right click mode).
Well done.