I don't remember this choice, probably by habits.
But you can configure the buttons on the config menu.
Really strange, there's no difference in the code between the whip key and the jump key. I don't know why it happens. Try to use the whip key as the jump key to see if it works. When you use the jump, hold down the key at least 1 second to make a full jump.
Haha, thanks for the video, it's quite fun to watch your gameplay and the comments (I kinda understand br). You seem to struggle with the axeman, I have to admit the hitbox is quite thin, due to the fact that the character is quite thin too. I will fix it.
Since the first prototype available here, i worked a lot on a real metroid like game based on this assets.
The player mechanics mimics super metroid.
Actually there's already 4 explorable zone: forest, lava, water and snow.
All the player abilities are almost done but needs some fixes here and there.
Some enemies are ready, others not yet implemented.
About bosses, the forest mini-boss is done. The lava and water bosses are almost done.
Here's a few screenshots, stay tunned !!