Made a spring bouncer but the problem is that my player's regular jump is now weaker although I didn't change the stats.
Uh... yes, you did change the stats. Right here:
You have the default jump strength for the platform behavior set to 700. If you want it to stay 700, then you need to say "700" there instead of "450."
Also, you see how you tell the platform behavior to Jump in event 2? That means when event 3 comes around, the player is no longer falling... it's jumping. So the event will not trigger. You need to not make a sub-event here. Do it like so instead:
This ensures that the event will trigger properly when the player falls onto the spring, and will activate the spring's animation.
You also need to uncheck "Loop" for the spring's bounce animation for "On bounce finished" event to work.
The game is coming along nicely, btw